{"id":"F2006B10312","name":"AD/GOV/5 - Governor Pump Idler Gear Stud - Replacement","slug":"ad-gov-5-governor-pump-idler-gear-stud-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56047,"registerId":"commonwealth-F2006B10312-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/GOV/5 - Governor Pump Idler Gear Stud - Replacement","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/5 Governor Pump Idler Gear Stud \\- Replacement 1/78\n\nApplicability: All Woodward propeller governors used on AiResearch TPE 331 engines and listed below.\n\nRequirement: Replace the governor pump idler gear stud in accordance with Woodward SB No.\n\n33565.\n\nEquipment Affected:\n\nWoodward Governor 210564 prior to change letter H. Woodward Governor 210570 prior to change letter R. Woodward Governor 210735 prior to change letter E. Woodward Governor 210736 prior to change letter E. Woodward Governor 210737 prior to change letter G. Woodward Governor 210738 prior to change letter E. Woodward Governor 210739 prior to change letter G. Woodward Governor 210740 prior to change letter A. Woodward Governor 210741 prior to change letter A. Woodward Governor 210742 prior to change letter A.\n\nCompliance: Within 300 hours time in service after 31 January 1978.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1693},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope targeting a specific mechanical defect in identified governor models. No expansion beyond the original equipment replacement requirement."},"complexity_factors":["Dense technical aviation terminology and manufacturer part numbering systems","Reference to external technical document (Woodward Service Bulletin 33565) without reproducing its instructions","Compliance threshold based on operational 'time in service' rather than simple calendar dates","Multiple specific equipment variants listed with pre-change-letter cutoffs"],"plain_english_summary":"This mandatory airworthiness directive requires owners/operators to replace the governor pump idler gear stud in specified Woodward propeller governors used on AiResearch TPE331 engines. It applies to listed governor part numbers manufactured before certain design revisions and must be done per Woodward Service Bulletin No. 33565 within 300 hours time-in-service after January 31, 1978.  \n\nThe action prevents governor mechanical failure that could lead to loss of engine power or propeller control in flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-gov-5-governor-pump-idler-gear-stud-replacement","history":"/api/acts/ad-gov-5-governor-pump-idler-gear-stud-replacement/history","analysis":"/api/acts/ad-gov-5-governor-pump-idler-gear-stud-replacement/analysis","conflicts":"/api/acts/ad-gov-5-governor-pump-idler-gear-stud-replacement/conflicts","importantCases":"/api/acts/ad-gov-5-governor-pump-idler-gear-stud-replacement/important-cases","documents":"/api/acts/ad-gov-5-governor-pump-idler-gear-stud-replacement/documents"}}