{"id":"F2006B05800","name":"AD/PA-31/95 - Elevator Bellcrank Assembly","slug":"ad-pa-31-95-elevator-bellcrank-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135719,"registerId":"commonwealth-F2006B05800-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/95 - Elevator Bellcrank Assembly","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-31/95 Elevator Bellcrank Assembly 12/80\n\nApplicability: All models PA-31 and PA-31-325 with S/Nos. 31-7912101 to 31-8012009. All models PA-31-50 with S/Nos. 31-7952193 to 31-8052012.\n\n \n\nRequirement: Action in accordance with Piper SB No. 685. Compliance:  Within 100 hours time in service after 31 December 1980.\n\nBackground:  The manufacturer has received a report that one of the bolts attaching the elevator control cables to the bellcrank assembly had partially backed out of the nut due to the omission of a split pin.\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":1724},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope as a targeted safety fix for a specific mechanical defect in defined aircraft models. It has not expanded beyond its initial purpose of mandating inspection and repair of elevator bellcrank assemblies to prevent control cable detachment."},"complexity_factors":["Narrow applicability limited to specific aircraft models and serial number ranges","Single mandatory action referencing one external technical document (Piper SB 685)","Simple compliance calculation based on flight hours only","No nested exceptions, conditional clauses, or defined terms sections"],"plain_english_summary":"Owners of certain Piper Navajo PA‑31, PA‑31‑325, and PA‑31‑50 aircraft within specified serial ranges must inspect and repair the elevator bellcrank assembly per Piper Service Bulletin No. 685. A missing or incorrect cotter (split) pin can allow the bolt to back out, risking loss of pitch control. Compliance is required within 100 flight hours after 31 December 1980."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-95-elevator-bellcrank-assembly","history":"/api/acts/ad-pa-31-95-elevator-bellcrank-assembly/history","analysis":"/api/acts/ad-pa-31-95-elevator-bellcrank-assembly/analysis","conflicts":"/api/acts/ad-pa-31-95-elevator-bellcrank-assembly/conflicts","importantCases":"/api/acts/ad-pa-31-95-elevator-bellcrank-assembly/important-cases","documents":"/api/acts/ad-pa-31-95-elevator-bellcrank-assembly/documents"}}