{"id":"F2008L04568","name":"AD/ENG/4 Amdt 11 - Piston Engine Continuing Airworthiness Requirements","slug":"ad-eng-4-amdt-11-piston-engine-continuing-airworthiness-requirements","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":120886,"registerId":"commonwealth-F2008L04568-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Engines - General","sectionType":"division","heading":"Engines - General","content":"### Engines - General\n\n| AD/ENG/4 Amdt 11 | Piston Engine ContinuingAirworthiness Requirements | 1/2009 |\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| | 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| 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 time between overhaul (TBO) periods for the engine.2. c. At intervals specified for that component, in the following order of priority:i) Aircraft manufacturer’s published TBO for that component.ii) If the aircraft manufacturer does not provide the schedule, then at intervals listed in the engine manufacturer’s published TBO for that component.iii) If the engine manufacturer does not provide the schedule, then at intervals listed in the component manufacturers published TBO for that component. |\n| | This Amendment becomes effective on 15 January 2009. |\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.Amendment 10 excluded compression-ignition engines from applicability list. The current amendment clarifies the requirement for time between overhaul for engine components and makes some editorial changes, where appropriate.Amendment 10 of this AD became effective on 26 October 2006.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\n28 November 2008\n\n| AD/ENG/4 Amdt 11 Appendix A | Piston Engine Condition Check | 1/2009 |\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 and take corrective actions as required.\n\nNote A2: 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 11","sectionType":"part","heading":"AD/ENG/4 Amdt 11","content":"## AD/ENG/4 Amdt 11","sortOrder":1},{"sectionNumber":"Piston Engine Continuing Airworthiness R","sectionType":"part","heading":"Piston Engine Continuing Airworthiness Requirements","content":"## Piston Engine Continuing \nAirworthiness Requirements","sortOrder":2},{"sectionNumber":"1/2009","sectionType":"part","heading":"1/2009","content":"## 1/2009","sortOrder":3},{"sectionNumber":"AD/ENG/4 Amdt 11 Appendix A","sectionType":"part","heading":"AD/ENG/4 Amdt 11 Appendix A","content":"## AD/ENG/4 Amdt 11 Appendix A","sortOrder":4},{"sectionNumber":"Piston Engine Condition Check","sectionType":"part","heading":"Piston Engine Condition Check","content":"## Piston Engine Condition Check","sortOrder":5},{"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 10 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 11 | Piston Engine ContinuingAirworthiness Requirements | 1/2009 |\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| | 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| 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 time between overhaul (TBO) periods for the engine.2. c. At intervals specified for that component, in the following order of priority:i) Aircraft manufacturer’s published TBO for that component.ii) If the aircraft manufacturer does not provide the schedule, then at intervals listed in the engine manufacturer’s published TBO for that component.iii) If the engine manufacturer does not provide the schedule, then at intervals listed in the component manufacturers published TBO for that component. |\n| | This Amendment becomes effective on 15 January 2009. |\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.Amendment 10 excluded compression-ignition engines from applicability list. The current amendment clarifies the requirement for time between overhaul for engine components and makes some editorial changes, where appropriate.Amendment 10 of this AD became effective on 26 October 2006.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\n28 November 2008\n\n| AD/ENG/4 Amdt 11 Appendix A | Piston Engine Condition Check | 1/2009 |\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 and take corrective actions as required.\n\nNote A2: 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 and take corrective actions as required.\n\nNote A2: 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 10 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 11 | Piston Engine ContinuingAirworthiness Requirements | 1/2009 |\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| | 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| 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 time between overhaul (TBO) periods for the engine.2. c. At intervals specified for that component, in the following order of priority:i) Aircraft manufacturer’s published TBO for that component.ii) If the aircraft manufacturer does not provide the schedule, then at intervals listed in the engine manufacturer’s published TBO for that component.iii) If the engine manufacturer does not provide the schedule, then at intervals listed in the component manufacturers published TBO for that component. |\n| | This Amendment becomes effective on 15 January 2009. |\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.Amendment 10 excluded compression-ignition engines from applicability list. The current amendment clarifies the requirement for time between overhaul for engine components and makes some editorial changes, where appropriate.Amendment 10 of this AD became effective on 26 October 2006.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\n28 November 2008\n\n| AD/ENG/4 Amdt 11 Appendix A | Piston Engine Condition Check | 1/2009 |\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 and take corrective actions as required.\n\nNote A2: 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":{"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"Compared with earlier versions, this amendment (Amdt 11) formalises condition checks (Appendix A) for engines under the CAR 42B maintenance schedule and expressly mandates overhaul periods for engines used in charter operations (Requirement; Appendix A). It also clarifies the time‑between‑overhaul scheduling priority for components (Compliance 2.c.i–iii). Amendment 10 had already removed compression‑ignition engines from applicability; that exclusion remains noted in this instrument (Background; Applicability)."},"complexity_factors":["Different obligations by operation type: private/aerial work require Appendix A checks; charter operations must also overhaul engines and components (Requirement).","Multiple cross‑references to Civil Aviation Regulations (CAR 42B, Schedule 5, CAR 206, CAR 42ZC, Schedule 8) requiring legal/regulatory alignment (Applicability; Requirement; Definitions).","Hierarchical TBO priority for component overhaul scheduling (aircraft manufacturer → engine manufacturer → component manufacturer) introduces conditional compliance paths (Compliance 2.c.i–iii).","Detailed procedural technical requirements in Appendix A (engine run parameters, cylinder leak checks, oil change/inspection, recordkeeping) with specified intervals and tolerances (Appendix A Requirements A1–A4; Compliance).","Mandatory use of approved data and approved organisations for bulk strip/overhaul increases administrative and approval burdens (Definitions: Bulk strip; Overhaul).","Record‑keeping obligations (CASA Form 728 or equivalent) and pilot attestations for RPM when stationary are specified, increasing operational paperwork (Appendix A A1 Note; A1).","Exclusion of compression‑ignition engines (scope nuance) requires operators to determine applicability for mixed fleets (Applicability; Background).","Effective dates and linkage to earlier amendments create versioning complexity for operators tracking prior ADs (Background; effective date statement)."],"plain_english_summary":"This Airworthiness Directive requires operators of piston‑engined aeroplanes maintained under CAR 42B to perform regular engine condition checks (set out in Appendix A) and, for charter operations, to overhaul engines and relevant components according to manufacturers’ time‑between‑overhaul (TBO) schedules. It excludes compression‑ignition (diesel/kerosene) piston engines. It matters because it prescribes concrete inspection, recording and overhaul obligations that change maintenance timing and record‑keeping for private, aerial‑work and charter operators."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":5,"scope_assessment":{"changed":true,"description":"The original directive (which superseded Air Navigation Order 108.5.2.1) has grown significantly through 11 amendments. Amendment 10 excluded compression-ignition engines entirely, narrowing applicability. Amendment 11 (this version) expands the scope by adding a detailed three-tier hierarchy for component overhaul intervals when manufacturer data conflicts, and clarifies definitions to address 'varying definitions of overhaul' in the industry. The background indicates the AD has shifted from simply introducing condition checks to actively mandating overhaul periods for charter operations as a matter of CASA policy for fare-paying passenger safety."},"complexity_factors":["Multiple operational categories with different requirements (Private/Aerial Work vs Charter)","Hierarchical compliance structure for component overhaul intervals (3-tier priority system: aircraft manufacturer → engine manufacturer → component manufacturer)","7 defined terms including technical definitions like 'bulk strip' and 'overhaul'","Cross-references to multiple external documents: CAR 42B, CAR 206, CAR 2, Schedule 5, Schedule 8, CAR 42ZC, CASR 39.001, AWB 85-005, AWB 85-4, AAC 6-32, and CASA Form 728","Conditional logic for take-off power measurement depending on propeller type (fixed pitch vs constant speed vs turbocharged)","Nested exceptions and tolerances (e.g., 'unless carried out by a pilot' exclusions, ±10 hour planning tolerances, ±10% intervals)","Dual compliance pathways for cylinder leak checks (manufacturer data OR CASA AAC 6-32 fallback)","Amendment history tracking showing evolution from original issue through 11 amendments"],"plain_english_summary":"This CASA Airworthiness Directive mandates specific maintenance for piston-engined light aircraft to reduce in‑flight engine failures. Private and aerial‑work operators must perform regular condition checks (engine runs, cylinder leak tests, oil/filter inspection and changes, and records); charter operators face the same checks plus mandatory overhauls at manufacturer TBO intervals. It applies to spark‑ignition piston engines under CAR 42B and excludes diesel/jet‑fuel piston engines."}},"importantCases":[],"_links":{"self":"/api/acts/ad-eng-4-amdt-11-piston-engine-continuing-airworthiness-requirements","history":"/api/acts/ad-eng-4-amdt-11-piston-engine-continuing-airworthiness-requirements/history","analysis":"/api/acts/ad-eng-4-amdt-11-piston-engine-continuing-airworthiness-requirements/analysis","conflicts":"/api/acts/ad-eng-4-amdt-11-piston-engine-continuing-airworthiness-requirements/conflicts","importantCases":"/api/acts/ad-eng-4-amdt-11-piston-engine-continuing-airworthiness-requirements/important-cases","documents":"/api/acts/ad-eng-4-amdt-11-piston-engine-continuing-airworthiness-requirements/documents"}}