{"id":"F2006L03260","name":"AD/ENG/4 Amdt 10 - Piston Engine Continuing Airworthiness Requirements","slug":"ad-eng-4-amdt-10-piston-engine-continuing-airworthiness-requirements","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":60623,"registerId":"commonwealth-F2006L03260-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Engines - General","sectionType":"division","heading":"Engines - General","content":"### Engines - General\n\n| AD/ENG/4 Amdt 10 | Piston Engine ContinuingAirworthiness Requirements | 12/2006 DM |\n| ---------------- | -------------------------------------------------- | ---------- |\n\n| Applicability: | Piston engines and those components necessary for the operation of the engine, installed in aeroplanes maintained in accordance with Civil Aviation Regulation CAR 42B CASA Maintenance Schedule.This Airworthiness Directive (AD) is not applicable to compression-ignition piston engines using diesel, jet A-1, Avtur, aviation kerosene or similar fuels. |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. For aircraft in Private operations and / or Aerial Work operations:To ensure the continuing airworthiness of the engine, and those components necessary for the operation of the engine, in addition to the requirements of Schedule 5 of the Civil Aviation Regulations; carry out the maintenance actions detailed in Appendix A of this Airworthiness Directive (AD).2. For aircraft in Charter operations:To ensure the continuing airworthiness of the engine, and those components necessary for the operation of the engine, in addition to the requirements of Schedule 5 of the Civil Aviation Regulations:a. Carry out the maintenance actions detailed in Appendix A of this AD; andb. Overhaul the engine; andc. Overhaul or replace those components necessary for the operation of the engine.Definitions:For the purpose of this AD, following definitions apply:Aerial Work operations: Operations as detailed in Civil Aviation Regulation CAR 206 (1) (a).Airworthy: Airworthy is defined as when an aircraft, including its component parts, meets its type design or properly altered condition (e.g.; the engine incorporates an STC or a CAR 35 approved modification), and it is in a condition for safe operation. |\n\n| | Bulk strip: For the purpose of this AD, a bulk strip is defined as the partial disassembly of the engine for the purpose of inspection or repair; the extent of which requires the separation of the crankcase parting flange or removal of the crankshaft.For the purpose of this AD, a bulk strip of an engine shall be carried out by an organisation approved for the purpose and in accordance with approved data. CASA airworthiness Bulletin (AWB) 85-005 elaborates on elements of an engine bulkstrip, where manufacturer’s instructions are not available.Charter Operations: Operations as detailed in Civil Aviation Regulation CAR 206 (1) (b).Overhaul: This definition addresses the issue of varying definitions of overhaul and for the purpose of this AD, when carrying out an overhaul of a piston engine or a component necessary for the operation of the engine, the overhaul shall be carried out by an organisation approved for the purpose and in accordance with the engine and component manufacturer’s published overhaul procedures; and / or other approved data, where manufacturer’s data is not available.Private operations: Operations as detailed in Civil Aviation Regulation (CAR) 2 (7) (d) and 2 (7A).Schedule 5: Schedule 5 is the CASA maintenance schedule as described in Civil Aviation Regulations 1988. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | 1. From the effective date of this AD, as detailed in the Appendix A.2. a. From the effective date of this AD, as detailed in the Appendix A.2. b. At intervals in accordance with the engine manufacturer’s published overhaul periods.2. c. At intervals not to exceed:i. As listed in the aircraft manufacturer’s maintenance schedule; orii. The engine manufacturer’s published time in service between overhaul period; oriii. The component manufacturer’s published overhaul or replacement period.Whichever is the greater. |\n| | This Amendment becomes effective on 26 October 2006. |\n\n| Background: | This Airworthiness Directive introduces condition checks for engines maintained in accordance with CASA maintenance schedule (CAR 42B). This AD also mandates the overhaul periods for engines engaged in charter operations reflecting CASA policy related to the aircraft engaged in fare-paying passenger operations.This amendment clarifies the compliance intervals for requirements laid down in Appendix A of this AD. Some editorial changes have also been made at the request of the Australian Transport Safety Bureau (ATSB).This amendment also excludes compression-ignition engines from applicability list.Amendment 9 of this AD became effective on 22 January 2004.Amendment 8 of this AD became effective on 26 December 2001.Amendment 7 of this AD became effective on 08 October 1998Amendment 6 of this AD was rescinded prior to the effective date.Amendment 5 of this AD became effective on 30 March 1995.The original issue of this Airworthiness Directive superseded Air Navigation Order 108.5.2.1. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n27 September 2006\n\n| AD/ENG/4 Amdt 10 Appendix A | Piston Engine Condition Check | 12/2006 |\n| --------------------------- | ----------------------------- | ------- |\n\nRequirement A1:\n\nCarry out an engine performance run to determine the engine performance in accordance with approved data.\n\nFor turbocharged / supercharged engines, the output parameters shall be adjusted in accordance with manufacturer’s data.\n\nRecord engine and aircraft details and parameters achieved during the engine run on “Piston Engine Condition Report” (CASA Form 728) or an equivalent form. All completed forms shall be part of the engine maintenance record.\n\n> Note A1: Where possible, maximum RPM is to be attained with the aircraft stationary. However, where the aircraft manufacturer details in approved maintenance data that maximum RPM can only be achieved during take-off or climb, or the aircraft type does not permit maximum RPM to be safely obtained whilst the aircraft is stationary, an entry on the aircraft maintenance release by the pilot in command of the maximum RPM during the last flight prior to the periodic engine inspection is acceptable data.\n\nEngine run parameters to be recorded include:\n\n#### a. Take-off power\n\n#### Take-off power shall be:\n\ni. For a fixed pitch propeller aircraft - static RPM.\n\nii. For a constant speed propeller, normally aspirated engine aircraft, take-off power shall be maximum RPM at a manifold pressure, not less than 2” of static manifold pressure.\n\niii. For a turbocharged/supercharged engine aircraft, take-off power shall be maximum RPM at the manifold pressure detailed in the aircraft flight manual.\n\n#### b. With the engine at operating temperature\n\ni. Oil pressure at idle and at take-off power.\n\nii. Oil temperature at idle and at take-off power.\n\niii. Cylinder head or exhaust gas temperature at take-off power.\n\niv. Fuel pressure/flow at take-off power.\n\nv. Ambient temperature and location altitude.\n\nRequirement A2:\n\nCarry out a cylinder leak check in accordance with:\n\na. The procedure(s) published by the engine manufacturer; or\n\nb. In accordance with CASA AAC 6-32, where data from the engine manufacturer is not available.\n\nRecord the results of each cylinder leak check and / or inspection in the engine logbook.\n\nRequirement A3:\n\nA3(a) Oil change\n\nReplace the engine oil and engine oil filter. Engine oil and the engine oil filter replacement in the period between the aircraft periodic inspections may be carried out by a pilot, other than a student pilot. CAR 42ZC (4) and Schedule 8 refers.\n\n##### A3(b) Engine oil filter, oil pressure screen and suction screen inspection\n\nAll engine oil and engine oil filter replacements, including those carried out in the period between the aircraft periodic inspections, unless carried out by a pilot, shall include inspecting the engine oil pressure filter, oil pressure screen and, if applicable, the oil suction screen, for evidence of metallic particles, shavings or flakes. Take corrective action, where necessary.\n\n##### A3(c) Engine oil uplifts\n\nRecord all oil uplifts. Review oil uplift records and take corrective actions, where necessary.\n\nRequirement A4:\n\nReview all data recorded per Requirement A1, A2 and A3 of this Appendix in order to assess the engine condition.\n\nNote A2: Engines that fail the condition check per this Appendix even after defect rectifications per the manufacturer’s recommendations are to be overhauled. Only airworthy engines (see definition) are to be placed in service.\n\nNote A3: AWB 85-4 “Aircraft Piston Engine Calendar Time Overhaul” provides guidelines for additional inspections related to the calendar time overhaul.\n\nCompliance:\n\n###### Requirement A1 \\- At each aircraft periodic inspection.\n\nRequirement A2 - At the intervals not exceeding 100 hours with a planning tolerance of plus or minus 10 hours.\n\nRequirement A3(a) \\- At intervals as published by the engine manufacturer with a planning tolerance of plus or minus 10%.\n\n###### Requirement A3(b) - At each oil change and oil filter replacement, if applicable.\n\n###### Requirement A3(c) \\- At each oil uplift.\n\nRequirement A4 - At each aircraft periodic inspection.","sortOrder":0},{"sectionNumber":"AD/ENG/4 Amdt 10","sectionType":"part","heading":"AD/ENG/4 Amdt 10","content":"## AD/ENG/4 Amdt 10","sortOrder":1},{"sectionNumber":"Piston Engine ContinuingAirworthiness Re","sectionType":"part","heading":"Piston Engine ContinuingAirworthiness Requirements","content":"## Piston Engine Continuing \nAirworthiness Requirements","sortOrder":2},{"sectionNumber":"12/2006 DM","sectionType":"part","heading":"12/2006 DM","content":"## 12/2006 DM","sortOrder":3},{"sectionNumber":"AD/ENG/4 Amdt 10 Appendix A","sectionType":"part","heading":"AD/ENG/4 Amdt 10 Appendix A","content":"## AD/ENG/4 Amdt 10 Appendix A","sortOrder":4},{"sectionNumber":"Piston Engine Condition Check","sectionType":"part","heading":"Piston Engine Condition Check","content":"## Piston Engine Condition Check","sortOrder":5},{"sectionNumber":"12/2006","sectionType":"part","heading":"12/2006","content":"## 12/2006","sortOrder":6},{"sectionNumber":"a. Take-off power","sectionType":"subdivision","heading":"a. Take-off power","content":"AIRWORTHINESS DIRECTIVE\n\nOn the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/ENG/4 Amdt 9 and issues the following AD under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n### Engines - General\n\n| AD/ENG/4 Amdt 10 | Piston Engine ContinuingAirworthiness Requirements | 12/2006 DM |\n| ---------------- | -------------------------------------------------- | ---------- |\n\n| Applicability: | Piston engines and those components necessary for the operation of the engine, installed in aeroplanes maintained in accordance with Civil Aviation Regulation CAR 42B CASA Maintenance Schedule.This Airworthiness Directive (AD) is not applicable to compression-ignition piston engines using diesel, jet A-1, Avtur, aviation kerosene or similar fuels. |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. For aircraft in Private operations and / or Aerial Work operations:To ensure the continuing airworthiness of the engine, and those components necessary for the operation of the engine, in addition to the requirements of Schedule 5 of the Civil Aviation Regulations; carry out the maintenance actions detailed in Appendix A of this Airworthiness Directive (AD).2. For aircraft in Charter operations:To ensure the continuing airworthiness of the engine, and those components necessary for the operation of the engine, in addition to the requirements of Schedule 5 of the Civil Aviation Regulations:a. Carry out the maintenance actions detailed in Appendix A of this AD; andb. Overhaul the engine; andc. Overhaul or replace those components necessary for the operation of the engine.Definitions:For the purpose of this AD, following definitions apply:Aerial Work operations: Operations as detailed in Civil Aviation Regulation CAR 206 (1) (a).Airworthy: Airworthy is defined as when an aircraft, including its component parts, meets its type design or properly altered condition (e.g.; the engine incorporates an STC or a CAR 35 approved modification), and it is in a condition for safe operation. |\n\n| | Bulk strip: For the purpose of this AD, a bulk strip is defined as the partial disassembly of the engine for the purpose of inspection or repair; the extent of which requires the separation of the crankcase parting flange or removal of the crankshaft.For the purpose of this AD, a bulk strip of an engine shall be carried out by an organisation approved for the purpose and in accordance with approved data. CASA airworthiness Bulletin (AWB) 85-005 elaborates on elements of an engine bulkstrip, where manufacturer’s instructions are not available.Charter Operations: Operations as detailed in Civil Aviation Regulation CAR 206 (1) (b).Overhaul: This definition addresses the issue of varying definitions of overhaul and for the purpose of this AD, when carrying out an overhaul of a piston engine or a component necessary for the operation of the engine, the overhaul shall be carried out by an organisation approved for the purpose and in accordance with the engine and component manufacturer’s published overhaul procedures; and / or other approved data, where manufacturer’s data is not available.Private operations: Operations as detailed in Civil Aviation Regulation (CAR) 2 (7) (d) and 2 (7A).Schedule 5: Schedule 5 is the CASA maintenance schedule as described in Civil Aviation Regulations 1988. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | 1. From the effective date of this AD, as detailed in the Appendix A.2. a. From the effective date of this AD, as detailed in the Appendix A.2. b. At intervals in accordance with the engine manufacturer’s published overhaul periods.2. c. At intervals not to exceed:i. As listed in the aircraft manufacturer’s maintenance schedule; orii. The engine manufacturer’s published time in service between overhaul period; oriii. The component manufacturer’s published overhaul or replacement period.Whichever is the greater. |\n| | This Amendment becomes effective on 26 October 2006. |\n\n| Background: | This Airworthiness Directive introduces condition checks for engines maintained in accordance with CASA maintenance schedule (CAR 42B). This AD also mandates the overhaul periods for engines engaged in charter operations reflecting CASA policy related to the aircraft engaged in fare-paying passenger operations.This amendment clarifies the compliance intervals for requirements laid down in Appendix A of this AD. Some editorial changes have also been made at the request of the Australian Transport Safety Bureau (ATSB).This amendment also excludes compression-ignition engines from applicability list.Amendment 9 of this AD became effective on 22 January 2004.Amendment 8 of this AD became effective on 26 December 2001.Amendment 7 of this AD became effective on 08 October 1998Amendment 6 of this AD was rescinded prior to the effective date.Amendment 5 of this AD became effective on 30 March 1995.The original issue of this Airworthiness Directive superseded Air Navigation Order 108.5.2.1. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n27 September 2006\n\n| AD/ENG/4 Amdt 10 Appendix A | Piston Engine Condition Check | 12/2006 |\n| --------------------------- | ----------------------------- | ------- |\n\nRequirement A1:\n\nCarry out an engine performance run to determine the engine performance in accordance with approved data.\n\nFor turbocharged / supercharged engines, the output parameters shall be adjusted in accordance with manufacturer’s data.\n\nRecord engine and aircraft details and parameters achieved during the engine run on “Piston Engine Condition Report” (CASA Form 728) or an equivalent form. All completed forms shall be part of the engine maintenance record.\n\n> Note A1: Where possible, maximum RPM is to be attained with the aircraft stationary. However, where the aircraft manufacturer details in approved maintenance data that maximum RPM can only be achieved during take-off or climb, or the aircraft type does not permit maximum RPM to be safely obtained whilst the aircraft is stationary, an entry on the aircraft maintenance release by the pilot in command of the maximum RPM during the last flight prior to the periodic engine inspection is acceptable data.\n\nEngine run parameters to be recorded include:\n\n#### a. Take-off power\n\n#### Take-off power shall be:\n\ni. For a fixed pitch propeller aircraft - static RPM.\n\nii. For a constant speed propeller, normally aspirated engine aircraft, take-off power shall be maximum RPM at a manifold pressure, not less than 2” of static manifold pressure.\n\niii. For a turbocharged/supercharged engine aircraft, take-off power shall be maximum RPM at the manifold pressure detailed in the aircraft flight manual.\n\n#### b. With the engine at operating temperature\n\ni. Oil pressure at idle and at take-off power.\n\nii. Oil temperature at idle and at take-off power.\n\niii. Cylinder head or exhaust gas temperature at take-off power.\n\niv. Fuel pressure/flow at take-off power.\n\nv. Ambient temperature and location altitude.\n\nRequirement A2:\n\nCarry out a cylinder leak check in accordance with:\n\na. The procedure(s) published by the engine manufacturer; or\n\nb. In accordance with CASA AAC 6-32, where data from the engine manufacturer is not available.\n\nRecord the results of each cylinder leak check and / or inspection in the engine logbook.\n\nRequirement A3:\n\nA3(a) Oil change\n\nReplace the engine oil and engine oil filter. Engine oil and the engine oil filter replacement in the period between the aircraft periodic inspections may be carried out by a pilot, other than a student pilot. CAR 42ZC (4) and Schedule 8 refers.\n\n##### A3(b) Engine oil filter, oil pressure screen and suction screen inspection\n\nAll engine oil and engine oil filter replacements, including those carried out in the period between the aircraft periodic inspections, unless carried out by a pilot, shall include inspecting the engine oil pressure filter, oil pressure screen and, if applicable, the oil suction screen, for evidence of metallic particles, shavings or flakes. Take corrective action, where necessary.\n\n##### A3(c) Engine oil uplifts\n\nRecord all oil uplifts. Review oil uplift records and take corrective actions, where necessary.\n\nRequirement A4:\n\nReview all data recorded per Requirement A1, A2 and A3 of this Appendix in order to assess the engine condition.\n\nNote A2: Engines that fail the condition check per this Appendix even after defect rectifications per the manufacturer’s recommendations are to be overhauled. Only airworthy engines (see definition) are to be placed in service.\n\nNote A3: AWB 85-4 “Aircraft Piston Engine Calendar Time Overhaul” provides guidelines for additional inspections related to the calendar time overhaul.\n\nCompliance:\n\n###### Requirement A1 \\- At each aircraft periodic inspection.\n\nRequirement A2 - At the intervals not exceeding 100 hours with a planning tolerance of plus or minus 10 hours.\n\nRequirement A3(a) \\- At intervals as published by the engine manufacturer with a planning tolerance of plus or minus 10%.\n\n###### Requirement A3(b) - At each oil change and oil filter replacement, if applicable.\n\n###### Requirement A3(c) \\- At each oil uplift.\n\nRequirement A4 - At each aircraft periodic inspection.","sortOrder":7},{"sectionNumber":"Take-off power shall be:","sectionType":"subdivision","heading":"Take-off power shall be:","content":"#### Take-off power shall be:\n\ni. For a fixed pitch propeller aircraft - static RPM.\n\nii. For a constant speed propeller, normally aspirated engine aircraft, take-off power shall be maximum RPM at a manifold pressure, not less than 2” of static manifold pressure.\n\niii. For a turbocharged/supercharged engine aircraft, take-off power shall be maximum RPM at the manifold pressure detailed in the aircraft flight manual.","sortOrder":8},{"sectionNumber":"b. With the engine at operating temperat","sectionType":"subdivision","heading":"b. With the engine at operating temperature","content":"#### b. With the engine at operating temperature\n\ni. Oil pressure at idle and at take-off power.\n\nii. Oil temperature at idle and at take-off power.\n\niii. Cylinder head or exhaust gas temperature at take-off power.\n\niv. Fuel pressure/flow at take-off power.\n\nv. Ambient temperature and location altitude.\n\nRequirement A2:\n\nCarry out a cylinder leak check in accordance with:\n\na. The procedure(s) published by the engine manufacturer; or\n\nb. In accordance with CASA AAC 6-32, where data from the engine manufacturer is not available.\n\nRecord the results of each cylinder leak check and / or inspection in the engine logbook.\n\nRequirement A3:\n\nA3(a) Oil change\n\nReplace the engine oil and engine oil filter. Engine oil and the engine oil filter replacement in the period between the aircraft periodic inspections may be carried out by a pilot, other than a student pilot. CAR 42ZC (4) and Schedule 8 refers.","sortOrder":9},{"sectionNumber":"A3(b) Engine oil filter, oil pressure sc","sectionType":"section","heading":"A3(b) Engine oil filter, oil pressure screen and suction screen inspection","content":"##### A3(b) Engine oil filter, oil pressure screen and suction screen inspection\n\nAll engine oil and engine oil filter replacements, including those carried out in the period between the aircraft periodic inspections, unless carried out by a pilot, shall include inspecting the engine oil pressure filter, oil pressure screen and, if applicable, the oil suction screen, for evidence of metallic particles, shavings or flakes. Take corrective action, where necessary.","sortOrder":10},{"sectionNumber":"A3(c) Engine oil uplifts","sectionType":"section","heading":"A3(c) Engine oil uplifts","content":"##### A3(c) Engine oil uplifts\n\nRecord all oil uplifts. Review oil uplift records and take corrective actions, where necessary.\n\nRequirement A4:\n\nReview all data recorded per Requirement A1, A2 and A3 of this Appendix in order to assess the engine condition.\n\nNote A2: Engines that fail the condition check per this Appendix even after defect rectifications per the manufacturer’s recommendations are to be overhauled. Only airworthy engines (see definition) are to be placed in service.\n\nNote A3: AWB 85-4 “Aircraft Piston Engine Calendar Time Overhaul” provides guidelines for additional inspections related to the calendar time overhaul.\n\nCompliance:","sortOrder":11},{"sectionNumber":"Requirement A1 - At each aircraft period","sectionType":"section","heading":"Requirement A1 - At each aircraft periodic inspection.","content":"###### Requirement A1 \\- At each aircraft periodic inspection.\n\nRequirement A2 - At the intervals not exceeding 100 hours with a planning tolerance of plus or minus 10 hours.\n\nRequirement A3(a) \\- At intervals as published by the engine manufacturer with a planning tolerance of plus or minus 10%.","sortOrder":12},{"sectionNumber":"Requirement A3(b) - At each oil change a","sectionType":"section","heading":"Requirement A3(b) - At each oil change and oil filter replacement, if applicable.","content":"AIRWORTHINESS DIRECTIVE\n\nOn the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/ENG/4 Amdt 9 and issues the following AD under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n### Engines - General\n\n| AD/ENG/4 Amdt 10 | Piston Engine ContinuingAirworthiness Requirements | 12/2006 DM |\n| ---------------- | -------------------------------------------------- | ---------- |\n\n| Applicability: | Piston engines and those components necessary for the operation of the engine, installed in aeroplanes maintained in accordance with Civil Aviation Regulation CAR 42B CASA Maintenance Schedule.This Airworthiness Directive (AD) is not applicable to compression-ignition piston engines using diesel, jet A-1, Avtur, aviation kerosene or similar fuels. |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. For aircraft in Private operations and / or Aerial Work operations:To ensure the continuing airworthiness of the engine, and those components necessary for the operation of the engine, in addition to the requirements of Schedule 5 of the Civil Aviation Regulations; carry out the maintenance actions detailed in Appendix A of this Airworthiness Directive (AD).2. For aircraft in Charter operations:To ensure the continuing airworthiness of the engine, and those components necessary for the operation of the engine, in addition to the requirements of Schedule 5 of the Civil Aviation Regulations:a. Carry out the maintenance actions detailed in Appendix A of this AD; andb. Overhaul the engine; andc. Overhaul or replace those components necessary for the operation of the engine.Definitions:For the purpose of this AD, following definitions apply:Aerial Work operations: Operations as detailed in Civil Aviation Regulation CAR 206 (1) (a).Airworthy: Airworthy is defined as when an aircraft, including its component parts, meets its type design or properly altered condition (e.g.; the engine incorporates an STC or a CAR 35 approved modification), and it is in a condition for safe operation. |\n\n| | Bulk strip: For the purpose of this AD, a bulk strip is defined as the partial disassembly of the engine for the purpose of inspection or repair; the extent of which requires the separation of the crankcase parting flange or removal of the crankshaft.For the purpose of this AD, a bulk strip of an engine shall be carried out by an organisation approved for the purpose and in accordance with approved data. CASA airworthiness Bulletin (AWB) 85-005 elaborates on elements of an engine bulkstrip, where manufacturer’s instructions are not available.Charter Operations: Operations as detailed in Civil Aviation Regulation CAR 206 (1) (b).Overhaul: This definition addresses the issue of varying definitions of overhaul and for the purpose of this AD, when carrying out an overhaul of a piston engine or a component necessary for the operation of the engine, the overhaul shall be carried out by an organisation approved for the purpose and in accordance with the engine and component manufacturer’s published overhaul procedures; and / or other approved data, where manufacturer’s data is not available.Private operations: Operations as detailed in Civil Aviation Regulation (CAR) 2 (7) (d) and 2 (7A).Schedule 5: Schedule 5 is the CASA maintenance schedule as described in Civil Aviation Regulations 1988. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | 1. From the effective date of this AD, as detailed in the Appendix A.2. a. From the effective date of this AD, as detailed in the Appendix A.2. b. At intervals in accordance with the engine manufacturer’s published overhaul periods.2. c. At intervals not to exceed:i. As listed in the aircraft manufacturer’s maintenance schedule; orii. The engine manufacturer’s published time in service between overhaul period; oriii. The component manufacturer’s published overhaul or replacement period.Whichever is the greater. |\n| | This Amendment becomes effective on 26 October 2006. |\n\n| Background: | This Airworthiness Directive introduces condition checks for engines maintained in accordance with CASA maintenance schedule (CAR 42B). This AD also mandates the overhaul periods for engines engaged in charter operations reflecting CASA policy related to the aircraft engaged in fare-paying passenger operations.This amendment clarifies the compliance intervals for requirements laid down in Appendix A of this AD. Some editorial changes have also been made at the request of the Australian Transport Safety Bureau (ATSB).This amendment also excludes compression-ignition engines from applicability list.Amendment 9 of this AD became effective on 22 January 2004.Amendment 8 of this AD became effective on 26 December 2001.Amendment 7 of this AD became effective on 08 October 1998Amendment 6 of this AD was rescinded prior to the effective date.Amendment 5 of this AD became effective on 30 March 1995.The original issue of this Airworthiness Directive superseded Air Navigation Order 108.5.2.1. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n27 September 2006\n\n| AD/ENG/4 Amdt 10 Appendix A | Piston Engine Condition Check | 12/2006 |\n| --------------------------- | ----------------------------- | ------- |\n\nRequirement A1:\n\nCarry out an engine performance run to determine the engine performance in accordance with approved data.\n\nFor turbocharged / supercharged engines, the output parameters shall be adjusted in accordance with manufacturer’s data.\n\nRecord engine and aircraft details and parameters achieved during the engine run on “Piston Engine Condition Report” (CASA Form 728) or an equivalent form. All completed forms shall be part of the engine maintenance record.\n\n> Note A1: Where possible, maximum RPM is to be attained with the aircraft stationary. However, where the aircraft manufacturer details in approved maintenance data that maximum RPM can only be achieved during take-off or climb, or the aircraft type does not permit maximum RPM to be safely obtained whilst the aircraft is stationary, an entry on the aircraft maintenance release by the pilot in command of the maximum RPM during the last flight prior to the periodic engine inspection is acceptable data.\n\nEngine run parameters to be recorded include:\n\n#### a. Take-off power\n\n#### Take-off power shall be:\n\ni. For a fixed pitch propeller aircraft - static RPM.\n\nii. For a constant speed propeller, normally aspirated engine aircraft, take-off power shall be maximum RPM at a manifold pressure, not less than 2” of static manifold pressure.\n\niii. For a turbocharged/supercharged engine aircraft, take-off power shall be maximum RPM at the manifold pressure detailed in the aircraft flight manual.\n\n#### b. With the engine at operating temperature\n\ni. Oil pressure at idle and at take-off power.\n\nii. Oil temperature at idle and at take-off power.\n\niii. Cylinder head or exhaust gas temperature at take-off power.\n\niv. Fuel pressure/flow at take-off power.\n\nv. Ambient temperature and location altitude.\n\nRequirement A2:\n\nCarry out a cylinder leak check in accordance with:\n\na. The procedure(s) published by the engine manufacturer; or\n\nb. In accordance with CASA AAC 6-32, where data from the engine manufacturer is not available.\n\nRecord the results of each cylinder leak check and / or inspection in the engine logbook.\n\nRequirement A3:\n\nA3(a) Oil change\n\nReplace the engine oil and engine oil filter. Engine oil and the engine oil filter replacement in the period between the aircraft periodic inspections may be carried out by a pilot, other than a student pilot. CAR 42ZC (4) and Schedule 8 refers.\n\n##### A3(b) Engine oil filter, oil pressure screen and suction screen inspection\n\nAll engine oil and engine oil filter replacements, including those carried out in the period between the aircraft periodic inspections, unless carried out by a pilot, shall include inspecting the engine oil pressure filter, oil pressure screen and, if applicable, the oil suction screen, for evidence of metallic particles, shavings or flakes. Take corrective action, where necessary.\n\n##### A3(c) Engine oil uplifts\n\nRecord all oil uplifts. Review oil uplift records and take corrective actions, where necessary.\n\nRequirement A4:\n\nReview all data recorded per Requirement A1, A2 and A3 of this Appendix in order to assess the engine condition.\n\nNote A2: Engines that fail the condition check per this Appendix even after defect rectifications per the manufacturer’s recommendations are to be overhauled. Only airworthy engines (see definition) are to be placed in service.\n\nNote A3: AWB 85-4 “Aircraft Piston Engine Calendar Time Overhaul” provides guidelines for additional inspections related to the calendar time overhaul.\n\nCompliance:\n\n###### Requirement A1 \\- At each aircraft periodic inspection.\n\nRequirement A2 - At the intervals not exceeding 100 hours with a planning tolerance of plus or minus 10 hours.\n\nRequirement A3(a) \\- At intervals as published by the engine manufacturer with a planning tolerance of plus or minus 10%.\n\n###### Requirement A3(b) - At each oil change and oil filter replacement, if applicable.\n\n###### Requirement A3(c) \\- At each oil uplift.\n\nRequirement A4 - At each aircraft periodic inspection.","sortOrder":13},{"sectionNumber":"Requirement A3(c) - At each oil uplift.","sectionType":"section","heading":"Requirement A3(c) - At each oil uplift.","content":"###### Requirement A3(c) \\- At each oil uplift.\n\nRequirement A4 - At each aircraft periodic inspection.","sortOrder":14}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-realtime","completionTokens":2478},"content_quality":"ok","complexity_score":6,"rejection_reason":"","scope_assessment":{"changed":false,"description":"This Amendment 10 clarifies compliance intervals for Appendix A requirements and excludes compression-ignition engines from applicability, but maintains the core scope of ensuring continuing airworthiness of piston engines through condition monitoring and mandatory overhauls for commercial operations. The directive has evolved through multiple amendments since superseding Air Navigation Order 108.5.2.1, but its fundamental safety purpose remains unchanged."},"complexity_factors":["Three-tier operational classification (Private, Aerial Work, Charter) with escalating compliance requirements","Seven defined technical terms including 'Bulk strip', 'Overhaul', and 'Airworthy' with specific regulatory meanings","External cross-references to Civil Aviation Regulations (CAR 42B, CAR 206, CAR 2, Schedule 5) and CASR 39.001","Compliance intervals with mathematical tolerances (e.g., 'plus or minus 10 hours', 'plus or minus 10%', 'whichever is the greater')","Alternative compliance pathways when manufacturer data unavailable (reference to CASA AAC 6-32)","Hierarchical appendix structure with nested sub-requirements (A3(a), A3(b), A3(c) under Requirement A3)"],"plain_english_summary":"This AD mandates regular, legally binding maintenance for petrol piston aircraft engines to reduce in‑flight failures. It requires routine engine condition checks (performance, compression, oil/filter inspection) for private and aerial‑work aircraft and adds compulsory complete engine and component overhauls at set intervals for charter (paying‑passenger) operations.\n\nIt excludes diesel/jet‑fuel piston engines and matters because it raises inspection and overhaul standards where passenger safety risks are highest."}},"importantCases":[],"_links":{"self":"/api/acts/ad-eng-4-amdt-10-piston-engine-continuing-airworthiness-requirements","history":"/api/acts/ad-eng-4-amdt-10-piston-engine-continuing-airworthiness-requirements/history","analysis":"/api/acts/ad-eng-4-amdt-10-piston-engine-continuing-airworthiness-requirements/analysis","conflicts":"/api/acts/ad-eng-4-amdt-10-piston-engine-continuing-airworthiness-requirements/conflicts","importantCases":"/api/acts/ad-eng-4-amdt-10-piston-engine-continuing-airworthiness-requirements/important-cases","documents":"/api/acts/ad-eng-4-amdt-10-piston-engine-continuing-airworthiness-requirements/documents"}}