{"id":"F2006B11236","name":"AD/M20/31 - Pilots Seats Installations - Modification","slug":"ad-m20-31-pilots-seats-installations-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56956,"registerId":"commonwealth-F2006B11236-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/M20/31 - Pilots Seats Installations - 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)  Mooney M20 Series Aeroplanes\n\n \n\nAD/M20/31 Pilots’ Seats Installations - Modification 4/78\n\nApplicability: All model M20J with S/Nos. 24-0361 to 24-0387, 24-0389 to 24-0394, 24-0396 to\n\n24-0403, 24-0405 to 24-0412, 24-0414, 24-0416, 24-0418 to 24-0422, 24-0424, 24-\n\n0425, 24-0427 to 24-0430, 24-0432, 24-0434, 24-0435, 24-0433.\n\n \n\nDocument: Mooney SB No. M20-211.\n\n \n\nCompliance: Within 100 hours time in service after 31 May 1978.\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":1424},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope: mandating a specific seat modification for a defined subset of Mooney M20J aircraft. There is no evidence of scope creep or expansion beyond the original safety intent."},"complexity_factors":["References external technical document (Mooney Service Bulletin M20-211) without including its contents","Precise applicability limited to specific aircraft serial numbers requiring cross-referencing","Uses aviation-specific terminology ('time in service', 'SB')"],"plain_english_summary":"**What this is:** A mandatory safety rule (called an *Airworthiness Directive*) that requires specific Mooney aircraft owners to modify their pilot seats.\n\n**Who it affects:** Owners and operators of Mooney M20J model aeroplanes with specific serial numbers (ranging from 24-0361 to 24-0435, with several gaps in the sequence).\n\n**What you must do:** Modify the pilot's seat installation according to the manufacturer's instructions in *Mooney Service Bulletin No. M20-211* (a technical notice from the plane maker).\n\n**When:** You must complete this modification within 100 hours of flying time after 31 May 1978.\n\n**Why it matters:** This ensures the pilot's seat is properly secured and safe during flight, preventing potential seat failure that could cause loss of aircraft control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-m20-31-pilots-seats-installations-modification","history":"/api/acts/ad-m20-31-pilots-seats-installations-modification/history","analysis":"/api/acts/ad-m20-31-pilots-seats-installations-modification/analysis","conflicts":"/api/acts/ad-m20-31-pilots-seats-installations-modification/conflicts","importantCases":"/api/acts/ad-m20-31-pilots-seats-installations-modification/important-cases","documents":"/api/acts/ad-m20-31-pilots-seats-installations-modification/documents"}}