{"id":"F2006B05523","name":"AD/PA-24/25 - Seat Frame - Modification","slug":"ad-pa-24-25-seat-frame-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46400,"registerId":"commonwealth-F2006B05523-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-24/25 - Seat Frame - 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-24 (Comanche) Series Aeroplanes\n\n \n\nAD/PA-24/25 Seat Frame - Modification 5/71\n\nApplicability: Model PA-24-260 with S/Nos. 24-4783, 24-4804 to 24-4962, 24-4964, 24-4965 and 24-4971 to 24-4973 having vertically adjustable pilot and/or co-pilot seat installations.\n\n \n\nDocument: Piper SB No. 336.\n\n \n\nCompliance: Within 100 hours time in service after 31 May 1971.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1564},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope targeting a specific mechanical defect in defined aircraft models. It has not expanded beyond the original safety intent of mandating seat frame modifications."},"complexity_factors":["Highly specific applicability limited to enumerated aircraft serial numbers","External technical reference (Piper Service Bulletin No. 336) not reproduced in the text","Technical compliance trigger ('time in service' rather than calendar date)"],"plain_english_summary":"**What it does:** This directive requires owners to modify the seat frames in specific Piper PA-24-260 Comanche aircraft to address a safety defect.\n\n**Who it affects:** Owners and operators of Piper PA-24-260 aeroplanes with these specific serial numbers:\n- 24-4783\n- 24-4803 through 24-4962  \n- 24-4964 and 24-4965\n- 24-4971 through 24-4973\n\nOnly aircraft with **vertically adjustable** pilot or co-pilot seats are affected.\n\n**What must be done:** The seat frames must be modified according to **Piper Service Bulletin No. 336** (a technical instruction manual from the manufacturer).\n\n**Deadline:** The work must be finished within **100 hours of flight time** (counted from when the engine starts) after 31 May 1971."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-24-25-seat-frame-modification","history":"/api/acts/ad-pa-24-25-seat-frame-modification/history","analysis":"/api/acts/ad-pa-24-25-seat-frame-modification/analysis","conflicts":"/api/acts/ad-pa-24-25-seat-frame-modification/conflicts","importantCases":"/api/acts/ad-pa-24-25-seat-frame-modification/important-cases","documents":"/api/acts/ad-pa-24-25-seat-frame-modification/documents"}}