{"id":"F2010L02223","name":"AD/PHZL/87 Amdt 2 - Propeller Thrust Bearings","slug":"ad-phzl-87-amdt-2-propeller-thrust-bearings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":124874,"registerId":"commonwealth-F2010L02223-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Propellers - Variable Pitch - Hartzell","sectionType":"division","heading":"Propellers - Variable Pitch - Hartzell","content":"### Propellers - Variable Pitch - Hartzell\n\n| AD/PHZL/87 Amdt 2 | Propeller Thrust Bearings | 16/2010 |\n| ----------------- | ------------------------- | ------- |\n\n| Applicability: | Hartzell Propeller Inc. model HC-E4A-3( )/E10950( ) propellers.The parentheses appearing in the propeller model number indicates the presence or absence of an additional letter(s) that varies the basic propeller model. This AD still applies regardless of whether these letters are present or absent in the propeller model designation.Note 1: These propellers are installed on, but not limited to, Raytheon Beechcraft 1900D aeroplanes.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Inspect and rework the propeller blade retention radius and replace the propeller thrust bearing for each blade, in accordance with paragraphs 3.G.(1) through 3.G.(9) of the Accomplishment Instructions of Hartzell Propeller Inc. SB No. HC-SB-61-287, Revision 4 dated 5 June 2009 or later FAA approved revision.Although Hartzell Propeller Inc. SB No. HC-SB-61-287, Revision 4, states in paragraph 3.G.(6) of the Accomplishment Instructions, to install new blade thrust bearings if required, this AD requires to always install new blade thrust bearings.For the purpose of this AD, next propeller disassembly is defined as any maintenance requiring separating of the propeller hub halves.Previous credit is allowed for inspections, rework, and replacements that were done using the preceding revisions of Hartzell Propeller Inc. SB No. HC-SB-61-287, before the effective date of this AD.Note 2: FAA AD 2007-08-02 Amdt 39-15019 dated 3 April 2007 refers. |\n| Compliance:    | For propellers with 4,000 or more operating hours time-since-overhaul (TSO), within 100 operating hours after the 7 June 2007 ( the effective date of the original issue of this AD), thereafter at intervals specified in the Compliance section of Hartzell Propeller Inc. SB No. HC-SB-61-287, Revision 4 or later FAA approved revision.For propellers with 2,000 or more operating hours TSO, but fewer than 4,000 operating hours TSO, at the next propeller disassembly, thereafter at intervals specified in the Compliance section of Hartzell Propeller Inc. SB No. HC-SB-61-287, Revision 4 or later FAA approved revision.                                                                                                                                                                                                                                                                                                                                                 |\n|                | This Amendment becomes effective on 24 August 2010.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n| Background:    | This AD results from reports of excessive propeller vibration and of damaged or broken propeller blade thrust bearings found during routine and investigative propeller disassembly. The issuing of this AD is to prevent propeller blade separation, damage to the aeroplane, and possible loss of aeroplane control.Amendment 1 increases the repetitive inspection/rework interval to reflect the latest revision of the manufacturers service bulletin which is approved as an AMOC to the original compliance interval as detailed in FAA AD 2007-08-02.Amendment 2 harmonizes the repetitive inspection/rework interval with the latest revision of the manufacturers service bulletin which is approved as an AMOC with FAA AD 2007-08-02.                                                                                                                                                                                                                                      |\n\n![](image.001.png)\n\nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n2 August 2010","sortOrder":0},{"sectionNumber":"AD/PHZL/87 Amdt 2","sectionType":"part","heading":"AD/PHZL/87 Amdt 2","content":"## AD/PHZL/87 Amdt 2","sortOrder":1},{"sectionNumber":"Propeller Thrust Bearings","sectionType":"part","heading":"Propeller Thrust Bearings","content":"## Propeller Thrust Bearings","sortOrder":2},{"sectionNumber":"16/2010","sectionType":"part","heading":"16/2010","content":"## 16/2010","sortOrder":3}],"analysis":{"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":4,"scope_assessment":{"changed":false,"description":"This is Amendment 2 to an existing AD. The amendments have remained tightly focused on the original safety purpose: preventing propeller blade separation due to thrust bearing failure. Amendment 1 and Amendment 2 both adjusted compliance intervals to harmonise with manufacturer service bulletin revisions, but did not expand the scope beyond the original safety intent."},"complexity_factors":["Multiple compliance pathways based on time-since-overhaul (TSO) hours creating tiered deadlines","Cross-reference to external manufacturer document (Hartzell SB HC-SB-61-287 Revision 4) which is incorporated by reference but not reproduced","Override of manufacturer's discretionary language ('if required' becomes mandatory 'must install')","Reference to prior FAA AD (2007-08-02) and previous amendments creating amendment lineage complexity","Defined term 'next propeller disassembly' with specific technical meaning","Credit provisions for work done under earlier revisions of the service bulletin"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and repair of blade retention areas and compulsory replacement of thrust bearings on Hartzell HC‑E4A‑3/E10950 series propellers to prevent vibration and potential blade separation. It affects operators (notably Beechcraft 1900D) and maintenance organisations and sets strict compliance deadlines based on hours since overhaul (high‑time props: 4,000+ hours — comply within 100 hours; 2,000–4,000 hours — at next disassembly)."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendment 2 changes the compliance scope by harmonising the repetitive inspection/rework intervals with the latest manufacturer service bulletin and FAA AMOC, and by clarifying that new blade thrust bearings must always be installed even where the SB allowed conditional replacement. It retains the same propeller model applicability but alters timing and mandatory replacement requirements and permits credit for prior work under earlier SB revisions."},"complexity_factors":["Technical instructions reference a manufacturer service bulletin (Hartzell HC‑SB‑61‑287 Rev 4) for detailed inspection and rework steps (Requirement).","AD overrides a conditional SB step by mandating new blade thrust bearings always be installed (Requirement: paragraph 3.G.(6) conflict).","Multiple compliance timing rules depending on propeller time‑since‑overhaul (TSO) brackets (Compliance: 4,000+ h; 2,000–4,000 h; next disassembly).","Definition-driven trigger for ‘next propeller disassembly’ (any maintenance separating hub halves) affects scheduling and planning (Requirement).","Interacts with prior FAA ADs and allows credit for work done under earlier SB revisions, creating cross-reference and audit complexity (Requirement/Background).","Applicability uses model numbers with optional parenthetical letters, requiring operators to check variant designations (Applicability).","Amendment history changes inspection intervals (Amendment 1 and 2), so operators must track which revision and AMOC apply (Background/Compliance)."],"plain_english_summary":"This Airworthiness Directive requires operators of Hartzell HC-E4A-3( )/E10950( ) variable‑pitch propellers (fitted to, for example, Beechcraft 1900D) to inspect and rework the blade retention radius and replace each blade’s thrust bearing following Hartzell Service Bulletin HC‑SB‑61‑287 Rev 4 (or later). The AD mandates installation of new thrust bearings and sets compliance timing by hours‑since‑overhaul or at next propeller disassembly. CASA issued it to reduce risk of blade separation and aircraft damage; operators must schedule and fund the inspections and replacements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-phzl-87-amdt-2-propeller-thrust-bearings","history":"/api/acts/ad-phzl-87-amdt-2-propeller-thrust-bearings/history","analysis":"/api/acts/ad-phzl-87-amdt-2-propeller-thrust-bearings/analysis","conflicts":"/api/acts/ad-phzl-87-amdt-2-propeller-thrust-bearings/conflicts","importantCases":"/api/acts/ad-phzl-87-amdt-2-propeller-thrust-bearings/important-cases","documents":"/api/acts/ad-phzl-87-amdt-2-propeller-thrust-bearings/documents"}}