{"id":"F2006B10308","name":"AD/GOV/10 Amdt 1 - Governor Flyweight Assembly","slug":"ad-gov-10-amdt-1-governor-flyweight-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56033,"registerId":"commonwealth-F2006B10308-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GOV/10 Amdt 1 - Governor Flyweight Assembly","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPropeller Governors\n\nAD/GOV/10\n\nAmdt 1\n\n  \nGovernor Flyweight Assembly 1/95\n\nApplicability: All model C290D\\[X\\]/T\\[X\\] governors with letter 'H' or prior used on Lycoming 540 series engines. Refer Requirement Documents for governor models and aircraft applicability.\n\nRequirement: 1. Unless previously carried out Action in accordance with McCauley Alert SB 202C.\n\n2. Unless previously carried out action in accordance with McCauley Alert SB 214.\n\nCompliance: 1. Within 25 hours time in service or at next annual inspection or within 12 calendar months from 5 January 1995, whichever occurs first.\n\n2. Within 200 hours time in service or at next annual inspection or within 12 calendar months from 5 January 1995, whichever occurs first.\n\nBackground: The manufacturer has advised that separation of the flyweight assembly and/or failure of the pilot spool end fitting, which may result in loss of governor control, has occurred. This amendment raised after advice from the manufacturer that there has been an increase in the failure rate of governors fitted to Mooney M20M and certain Maule and Commander 114B series aircraft.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2156},"content_quality":"ok","complexity_score":5,"scope_assessment":{"changed":true,"description":"This amendment expands the original directive's scope to specifically address increased failure rates in Mooney M20M, Maule, and Commander 114B aircraft, beyond the general applicability to all affected governor models in the original issue."},"complexity_factors":["Conditional applicability clauses ('Unless previously carried out') creating exceptions for prior compliance","Cross-references to external manufacturer technical documents (McCauley Alert SB 202C and SB 214) not contained within the instrument","Technical aviation terminology requiring specialized knowledge (flyweight assembly, pilot spool, propeller governors)","Tiered compliance timeframes with multiple triggering events (25 hours vs 200 hours time in service, annual inspection, or calendar months)","Alphanumeric model identification with revision letter coding ('H' or prior)"],"plain_english_summary":"This AD mandates inspections and corrective actions for aircraft using McCauley C290D/C290T governors (marked “H” or earlier) on Lycoming 540 engines—notably Mooney M20M, Maule, and Commander 114B operators. It requires compliance with McCauley Alert Service Bulletins 202C and 214 within short flight-hour or annual-inspection windows. The rule responds to discovered flyweight assembly or pilot-spool end-fitting failures that can cause total propeller control loss, engine damage, or loss of aircraft control; Amendment 1 follows higher-than-expected failure rates."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gov-10-amdt-1-governor-flyweight-assembly","history":"/api/acts/ad-gov-10-amdt-1-governor-flyweight-assembly/history","analysis":"/api/acts/ad-gov-10-amdt-1-governor-flyweight-assembly/analysis","conflicts":"/api/acts/ad-gov-10-amdt-1-governor-flyweight-assembly/conflicts","importantCases":"/api/acts/ad-gov-10-amdt-1-governor-flyweight-assembly/important-cases","documents":"/api/acts/ad-gov-10-amdt-1-governor-flyweight-assembly/documents"}}