{"id":"F2006B07272","name":"AD/TB 200/5 - Seat Unlocking","slug":"ad-tb-200-5-seat-unlocking","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49203,"registerId":"commonwealth-F2006B07272-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nAerospatiale (Socata) TB 200 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/TB 200/5 Seat Unlocking 7/2001","sectionType":"part","heading":"AD/TB 200/5 Seat Unlocking 7/2001","content":"# AD/TB 200/5 Seat Unlocking 7/2001\n\nApplicability: All TB 200 aircraft without Socata modification No. 165 incorporated in production. Requirement: Action in accordance with Socata Service Bulletin No. 10-115-25.\n\nNote: DGAC AD 2001-005(A) refers.\n\nCompliance: Unless already accomplished, at the next scheduled inspection after 19 July 2001.\n\nThis Airworthiness Directive becomes effective on 12 July 2001.\n\nBackground: The manufacturer received reports of front seats unlocking. Investigation revealed interference of the seat pan with the locking mechanism as the cause. This Directive requires modification action.\n\n![Signature of David Alan Villiers Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 1 June 2001\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 13 June 2001.","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive addressing a specific mechanical defect in a specific aircraft type. The scope remains tightly focused on the seat unlocking issue as originally identified."},"complexity_factors":["Single, clearly defined applicability (one aircraft model series, one specific exclusion)","Single requirement referencing external technical document (Service Bulletin)","Simple compliance deadline (next scheduled inspection after fixed date)","No defined terms section","No nested conditions or exceptions","Minimal cross-referencing (one note to French aviation authority directive)","Total length: approximately 200 words of substantive text"],"plain_english_summary":"CASA has issued a mandatory safety order for certain French-built Aerospatiale/Socata TB 200 series aeroplanes that lack factory mod No. 165, requiring installation of the manufacturer’s repair (Service Bulletin No. 10‑115‑25) at the next scheduled inspection after 19 July 2001. Owners, operators and maintenance engineers must comply.\n\nThe fix prevents front seats from unexpectedly unlocking in flight, addressing a serious safety hazard by making the corrective action compulsory across the fleet."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope aligns with the instrument's stated objective: it targets TB 200 aeroplanes lacking Socata mod No. 165 and mandates the manufacturer’s prescribed modification. The AD does not broaden applicability or add recurring obligations beyond performing the service‑bulletin modification at the next scheduled inspection."},"complexity_factors":["Narrow applicability: only TB 200 aircraft without Socata modification No. 165 are affected (Applicability).","Technical action not set out in full: the AD mandates compliance by reference to Socata Service Bulletin No. 10-115-25 rather than prescribing step‑by‑step measures (Requirement).","Compliance timing tied to scheduling: action required at the next scheduled inspection after a fixed date (Compliance).","Delegated administrative authority: issued under CAR 1998 subregulation 39.1(1) by a CASA delegate, creating reliance on administrative discretion (Header/Signature).","Cross-reference to foreign directive: notes DGAC AD 2001-005(A), introducing potential reliance on overseas certification/analysis (Note).","Limited procedural detail in the AD increases dependence on manufacturer documentation and maintenance providers for correct implementation (Requirement/Background)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Aerospatiale (Socata) TB 200 aeroplanes that do not have Socata modification No. 165 to carry out the modification described in Socata Service Bulletin No. 10-115-25 to prevent front seats unlocking (caused by seat‑pan interference with the locking mechanism). Compliance is required at the next scheduled inspection after 19 July 2001; the AD took effect 12 July 2001. The operator pays to implement the service‑bulletin modification; CASA (via its delegate) imposed the requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tb-200-5-seat-unlocking","history":"/api/acts/ad-tb-200-5-seat-unlocking/history","analysis":"/api/acts/ad-tb-200-5-seat-unlocking/analysis","conflicts":"/api/acts/ad-tb-200-5-seat-unlocking/conflicts","importantCases":"/api/acts/ad-tb-200-5-seat-unlocking/important-cases","documents":"/api/acts/ad-tb-200-5-seat-unlocking/documents"}}