{"id":"F2006B05978","name":"AD/PA-42/12 - Engine Electrical Harness and Starter Generator Cables","slug":"ad-pa-42-12-engine-electrical-harness-and-starter-generator-cables","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136177,"registerId":"commonwealth-F2006B05978-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-42/12 - Engine Electrical Harness and Starter Generator Cables","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-42 (Cheyenne III) Series Aeroplanes\n\n \n\n# AD/PA-42/12 Engine Electrical Harness and Starter Generator Cables\n\nApplicability: PA-42-1000 Cheyenne 400LS with S/Nos: 42-5527002 through 42-5527006\n\n42-5527008 through 42-5527021\n\n \n\n42-5527023 through 42-5527032.\n\n \n\nRequirement: Action in accordance with Piper S.B. No. 835. Compliance:  Within 50 hours time in service after 31 July 1986.\n\n# 7/86\n\nBackground: Reports have been received of wire damage caused by contact of the engine electrical harness and starter generator cables with the wing leading edge inboard nose rib.\n\nElectrical system failures could result.\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":1739},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete Airworthiness Directive addressing a specific technical defect (wire chafing) on a narrow subset of aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely brief instrument (under 200 words)","Single discrete applicability criteria (specific aircraft serial numbers only)","One unambiguous compliance action (follow Piper SB 835)","No defined terms, cross-references to other legislation, or conditional exceptions","Simple calendar/flight hours deadline"],"plain_english_summary":"This Airworthiness Directive (AD) is a mandatory safety order for owners and operators of specific Piper Cheyenne 400LS aircraft.\n\n**Who it affects:** Owners of PA-42-1000 Cheyenne 400LS aeroplanes with specific serial numbers: 42-5527002 through 42-5527006, 42-5527008 through 42-5527021, and 42-5527023 through 42-5527032.\n\n**The problem:** Engine electrical harnesses and starter generator cables have been rubbing against a wing rib (the inboard nose rib of the leading edge), damaging the wires. This chafing could cause electrical system failures.\n\n**What must be done:** Operators must complete the inspections and repairs detailed in **Piper Service Bulletin No. 835** within **50 flight hours** after 31 July 1986.\n\n**Why it matters:** Damaged electrical wiring can lead to in-flight electrical failures, potentially disabling critical aircraft systems and compromising safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-42-12-engine-electrical-harness-and-starter-generator-cables","history":"/api/acts/ad-pa-42-12-engine-electrical-harness-and-starter-generator-cables/history","analysis":"/api/acts/ad-pa-42-12-engine-electrical-harness-and-starter-generator-cables/analysis","conflicts":"/api/acts/ad-pa-42-12-engine-electrical-harness-and-starter-generator-cables/conflicts","importantCases":"/api/acts/ad-pa-42-12-engine-electrical-harness-and-starter-generator-cables/important-cases","documents":"/api/acts/ad-pa-42-12-engine-electrical-harness-and-starter-generator-cables/documents"}}