{"id":"F2006B05993","name":"AD/PA-42/3 - Tail Fin/Fuselage, Rivet Installation - Replacement","slug":"ad-pa-42-3-tail-fin-fuselage-rivet-installation-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114391,"registerId":"commonwealth-F2006B05993-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-42/3 - Tail Fin/Fuselage, Rivet Installation - Replacement","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\nAD/PA-42/3 Tail Fin/Fuselage, Rivet Installation - Replacement 9/83\n\nApplicability: All model PA-42 with S/Nos. listed in Piper Service Bulletin No. 765. Document: Piper S.B. No. 765.\n\nCompliance: Within 100 hours time in service after 30th September 1983.\n\n \n\nBackground:  Field reports indicate that the rivets at the intersection of the tail fin/fuselage drag angle and tail fin front spar are working loose.\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\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1897},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope as a targeted safety fix for a specific mechanical defect on identified aircraft models."},"complexity_factors":["Single mechanical compliance action required (rivet replacement)","External reference to Piper Service Bulletin 765 for serial number applicability","Simple time-based compliance trigger (100 hours time in service after fixed date)","No exceptions, exemptions, or conditional logic"],"plain_english_summary":"**What it does**\nThis Airworthiness Directive (a mandatory safety rule) requires owners to replace loose rivets where the tail fin attaches to the fuselage on specific Piper PA-42 Cheyenne III aircraft.\n\n**Who it affects**\nOwners and operators of Piper PA-42 model aircraft with serial numbers listed in *Piper Service Bulletin No. 765*.\n\n**What you must do**\nHave a qualified mechanic inspect and replace the rivets at the intersection of the tail fin/fuselage drag angle and tail fin front spar within **100 hours of flight time** after 30 September 1983.\n\n**Why it matters**\nField reports indicated these rivets were working loose in service. If left unaddressed, this could compromise the structural integrity of the tail section, creating a flight safety risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-42-3-tail-fin-fuselage-rivet-installation-replacement","history":"/api/acts/ad-pa-42-3-tail-fin-fuselage-rivet-installation-replacement/history","analysis":"/api/acts/ad-pa-42-3-tail-fin-fuselage-rivet-installation-replacement/analysis","conflicts":"/api/acts/ad-pa-42-3-tail-fin-fuselage-rivet-installation-replacement/conflicts","importantCases":"/api/acts/ad-pa-42-3-tail-fin-fuselage-rivet-installation-replacement/important-cases","documents":"/api/acts/ad-pa-42-3-tail-fin-fuselage-rivet-installation-replacement/documents"}}