{"id":"F2006B05766","name":"AD/PA-31/61 - Elevator Bell Crank and Control Rod - Inspection","slug":"ad-pa-31-61-elevator-bell-crank-and-control-rod-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135625,"registerId":"commonwealth-F2006B05766-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/61 - Elevator Bell Crank and Control Rod - Inspection","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Piper PA-31 Series Aeroplanes\n\n \n\nAD/PA-31/61 Elevator Bell Crank and Control Rod - Inspection 1/78\n\nApplicability: All models PA-31, PA-31-300 and PA-31-325 with S/Nos. 31-2 to 31-7712034. All model PA-31-350 with S/Nos. 31-5001 to 31-7752059; All model PA-31P with S/Nos. 31P-1 to 31P-7730003, and All model PA-31T with S/Nos. 31T-7400002 to 31T-7720017.\n\n \n\nDocument: Piper SL No. 789.\n\n \n\nCompliance: Within 100 hours time in service after 31 January 1978 and there- after at intervals not exceeding 3 years.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2446},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope as a targeted airworthiness inspection for specific mechanical components on defined aircraft models. No expansion beyond the original aviation safety purpose is evident."},"complexity_factors":["Multiple aircraft variants (6 models) with distinct serial number ranges in applicability section","Cross-reference to external technical document (Piper Service Letter No. 789) without excerpting the actual inspection steps","Specialized aviation terminology ('time in service', 'elevator bell crank') requiring technical knowledge to interpret"],"plain_english_summary":"Owners/operators of specified Piper PA‑31 series aircraft (listed by serial ranges) must inspect the elevator bell crank and control rod — key components of pitch control — under a mandatory CASA rule. The first inspection is within 100 flight hours after 31 Jan 1978, with repeats every three years. This measure prevents catastrophic pitch‑control failure; inspection procedures are in Piper Service Letter No. 789."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-61-elevator-bell-crank-and-control-rod-inspection","history":"/api/acts/ad-pa-31-61-elevator-bell-crank-and-control-rod-inspection/history","analysis":"/api/acts/ad-pa-31-61-elevator-bell-crank-and-control-rod-inspection/analysis","conflicts":"/api/acts/ad-pa-31-61-elevator-bell-crank-and-control-rod-inspection/conflicts","importantCases":"/api/acts/ad-pa-31-61-elevator-bell-crank-and-control-rod-inspection/important-cases","documents":"/api/acts/ad-pa-31-61-elevator-bell-crank-and-control-rod-inspection/documents"}}