{"id":"F2006B06027","name":"AD/PA-46/21 - Empennage Skin Rivets","slug":"ad-pa-46-21-empennage-skin-rivets","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114425,"registerId":"commonwealth-F2006B06027-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-46/21 - Empennage Skin Rivets","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-46 (Malibu) Series Aeroplanes\n\n \n\nAD/PA-46/21 Empennage Skin Rivets 9/92\n\nApplicability: Model PA-46-310P with serial numbers 46-8408001 through 46-8608067, and 4608001 through 4608140, and Model PA-46-350P with serial numbers 4622001 through 4622109.\n\n \n\nRequirement: Replace the empennage countersunk rivets indicated in Piper SB 944, with universal head rivets of a larger diameter in accordance with the INSTUCTIONS section of Piper SB 944.\n\n \n\nNote: FAA AD 92-13-07 Amdt 39-8277 refers.\n\n \n\nCompliance: Within 100 hours time in service after 20 August 1992.\n\n \n\nBackground: General maintenance inspections of the empennage of the affected aircraft have revealed loose rivets working into the skin. Undetected loose rivets could eventually lead to a weakened aircraft structure.\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":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument's scope is confined to the listed PA-46-310P and PA-46-350P serial numbers and requires a single corrective action (rivet replacement) per Piper SB 944 within the stated 100-hour window. The AD does not expand applicability beyond those serial numbers or add further maintenance obligations in the text provided."},"complexity_factors":["Narrow applicability limited to specific models and serial numbers (Applicability).","Prescriptive technical remedy requiring replacement with larger-diameter universal-head rivets per Piper SB 944 (Requirement).","Mandatory, short compliance window: within 100 hours time in service after 20 August 1992 (Compliance).","Dependence on an external manufacturer's service bulletin for installation instructions (Requirement references Piper SB 944).","Cross-reference to FAA AD 92-13-07, adding an external regulatory linkage (Note).","Safety rationale tied to inspection findings of loose rivets that could weaken structure (Background).","Issued under CASA airworthiness directive process (COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 — header implies regulator authority)."],"plain_english_summary":"This Airworthiness Directive orders owners/operators of specified Piper PA-46-310P and PA-46-350P aeroplanes (listed serial numbers) to replace certain empennage countersunk rivets with larger-diameter universal-head rivets following Piper Service Bulletin 944. The AD explains inspections found loose rivets that can work into the skin and potentially weaken structure; it requires compliance within 100 flight hours after 20 August 1992."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating a single maintenance action."},"complexity_factors":["Single, specific mechanical task (rivet replacement)","Only 2 aircraft models affected, with clearly listed serial number ranges","No defined terms section — all technical terms are standard aviation vocabulary","No cross-references to other legislation beyond a single note about the corresponding FAA directive","Simple compliance deadline (100 hours time in service)","No conditional logic, exceptions, or nested provisions","Total length: approximately 200 words"],"plain_english_summary":"This CASA Airworthiness Directive mandates replacing specific countersunk rivets in the empennage of certain Piper PA‑46‑310P and early PA‑46‑350P aeroplanes with larger universal‑head rivets per Piper Service Bulletin 944.  \n\nInspections found rivets working loose and into the skin, risking tail structural weakening and potential loss of control; owners/operators must comply within 100 flight hours after 20 August 1992. This mirrors FAA AD 92‑13‑07."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-46-21-empennage-skin-rivets","history":"/api/acts/ad-pa-46-21-empennage-skin-rivets/history","analysis":"/api/acts/ad-pa-46-21-empennage-skin-rivets/analysis","conflicts":"/api/acts/ad-pa-46-21-empennage-skin-rivets/conflicts","importantCases":"/api/acts/ad-pa-46-21-empennage-skin-rivets/important-cases","documents":"/api/acts/ad-pa-46-21-empennage-skin-rivets/documents"}}