{"id":"F2006B07301","name":"AD/TB10/32 - Seat Unlocking","slug":"ad-tb10-32-seat-unlocking","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49284,"registerId":"commonwealth-F2006B07301-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) TB9 & TB10 (Tobago) Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/TB 10/32 Seat Unlocking 7/2001","sectionType":"part","heading":"AD/TB 10/32 Seat Unlocking 7/2001","content":"# AD/TB 10/32 Seat Unlocking 7/2001\n\nApplicability: All TB9 and TB10 aircraft without Socata modification No. 165 incorporated in production.\n\nRequirement: 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)","sortOrder":1}],"analysis":{"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":2,"scope_assessment":{"changed":false,"description":"Scope remains aligned with the manufacturer's corrective intent: it targets TB9/TB10 aeroplanes lacking Socata mod No. 165 and mandates the service-bulletin modification to correct seat pan interference. The AD does not broaden applicability or impose recurring obligations beyond the required modification and its timing."},"complexity_factors":["Narrow applicability: only TB9 and TB10 aircraft without Socata modification No. 165 are affected (simple population to identify).","Single, prescriptive remedy: compliance requires action in accordance with Socata Service Bulletin No. 10-115-25 (reduces regulatory ambiguity).","Timing tied to scheduled inspection after 19 July 2001: allows deferred compliance to routine maintenance windows but creates a single scheduling constraint.","Low regulatory discretion: CASA delegate issues the AD under CAR 1998 subreg 39.1(1) with a clear effective date (limited interpretive space).","Compliance cost and logistics fall on owners/operators: parts, labour and workshop scheduling create operational costs and opportunity cost for operators.","Need to verify whether Socata mod No. 165 is already embodied on an aircraft (administrative check for each aircraft).","Cross-reference: DGAC AD 2001-005(A) noted, so international service/airworthiness records may need review."],"plain_english_summary":"Requires modifying the front-seat locking mechanism on Aerospatiale (Socata) TB9 and TB10 (Tobago) aircraft that were not produced with Socata modification No. 165, to prevent reported front seats from unlocking. The work must follow Socata Service Bulletin No. 10-115-25 and be completed at the next scheduled inspection after 19 July 2001.\n\nOwners/operators must arrange and pay for the modification; the Civil Aviation Safety Authority issued the directive under CAR 1998 subregulation 39.1(1). The change mechanically removes interference between the seat pan and the lock identified by the manufacturer."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with narrow, targeted scope addressing a specific mechanical defect in specific aircraft models. No scope creep is evident."},"complexity_factors":["Single, specific aircraft model applicability","One clear requirement referencing an external technical document (Service Bulletin)","Simple compliance deadline (next scheduled inspection after fixed date)","No defined terms section","No nested exceptions or conditional logic","Background explanation is straightforward and concise","Total length is approximately 200 words"],"plain_english_summary":"This CASA safety order mandates owners/operators of Socata TB9 and TB10 aircraft (without factory modification No. 165) to carry out the manufacturer’s Service Bulletin seat modification because the front seat pan can interfere with the lock and allow the seat to unlock in flight. The repair is compulsory for affected aircraft and must be done at the next scheduled inspection after 19 July 2001; it also directs maintenance engineers who service these planes."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tb10-32-seat-unlocking","history":"/api/acts/ad-tb10-32-seat-unlocking/history","analysis":"/api/acts/ad-tb10-32-seat-unlocking/analysis","conflicts":"/api/acts/ad-tb10-32-seat-unlocking/conflicts","importantCases":"/api/acts/ad-tb10-32-seat-unlocking/important-cases","documents":"/api/acts/ad-tb10-32-seat-unlocking/documents"}}