{"id":"F2006B05604","name":"AD/PA-28/46 - Wing Reinforcement - Modification","slug":"ad-pa-28-46-wing-reinforcement-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135214,"registerId":"commonwealth-F2006B05604-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/46 - Wing Reinforcement - Modification","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-28 Series Aeroplanes\n\n \n\nAD/PA-28/46 Wing Reinforcement - Modification 7/74\n\nApplicability: Model PA-28-151.\n\n \n\nDocument: Piper SB No. 424 (Kit No. 760878V).\n\n \n\nCompliance: Within 100 hours time in service after 31 July 1974.\n\n \n\nNote: Incorporation of this modification will remove the weight restriction required by AD/PA-28/45.\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":2119},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow technical scope as a specific safety remediation for a single aircraft model's wing structure. There is no evidence of scope expansion beyond the original 1974 safety purpose."},"complexity_factors":["Single aircraft model specified in applicability clause (PA-28-151 only)","Single mandatory action referencing one manufacturer service bulletin (SB No. 424)","Compliance deadline expressed as simple time-in-service calculation without conditional triggers","No defined terms section or interpretation provisions","No exemptions, alternative compliance methods, or exception clauses"],"plain_english_summary":"**What this does:** This is a mandatory safety order (called an **Airworthiness Directive**) issued by the Civil Aviation Safety Authority. It requires owners and operators of specific Piper aircraft to install a wing reinforcement kit to fix a structural safety issue.\n\n**Who it affects:** Owners and operators of **Piper PA-28-151** model aeroplanes only.\n\n**What must be done:** Install the wing reinforcement modification according to **Piper Service Bulletin No. 424** (using Kit No. 760878V). This work must be completed within **100 hours of flight time** after 31 July 1974.\n\n**Why it matters:** The modification addresses potential structural weakness in the wings. Once installed, it removes a previous weight restriction (imposed by Directive AD/PA-28/45), allowing the aircraft to carry full passenger and cargo loads again."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-46-wing-reinforcement-modification","history":"/api/acts/ad-pa-28-46-wing-reinforcement-modification/history","analysis":"/api/acts/ad-pa-28-46-wing-reinforcement-modification/analysis","conflicts":"/api/acts/ad-pa-28-46-wing-reinforcement-modification/conflicts","importantCases":"/api/acts/ad-pa-28-46-wing-reinforcement-modification/important-cases","documents":"/api/acts/ad-pa-28-46-wing-reinforcement-modification/documents"}}