{"id":"F2006B07302","name":"AD/TB10/33 - Nose Gear Fork","slug":"ad-tb10-33-nose-gear-fork","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49287,"registerId":"commonwealth-F2006B07302-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\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 CASR 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\n![](image.001.png)  \n\nAerospatiale (Socata) TB9 and TB10 (Tobago) Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/TB10/33 Nose Gear Fork 10/2001","sectionType":"part","heading":"AD/TB10/33 Nose Gear Fork 10/2001","content":"# AD/TB10/33 Nose Gear Fork 10/2001\n\nApplicability: TB9 and TB10 aircraft with nose gear forks delivered as spare parts by Socata between 1 January 1999 and 28 February 2001.\n\nRequirement: Action in accordance with Socata Service Bulletin SB 10-120-32, dated June 2001.\n\nNote: DGAC AD 2001-305(A) refers.\n\nCompliance: At the next scheduled maintenance visit after 4 October 2001 or before 31 March 2002, whichever occurs first.\n\nThis Airworthiness Directive becomes effective on 4 October 2001.\n\nBackground: A fault in the nose gear fork manufacturing process has been identified.\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 24 August 2001\n\n![](image.001.png)","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD implements a narrowly focused corrective requirement targeted at a specific manufacturing fault and defined set of spare parts; it does not expand or alter the population affected beyond the dates and parts specified in the applicability clause."},"complexity_factors":["Narrow applicability: only TB9/TB10 aircraft with nose gear forks supplied as Socata spare parts between 1 Jan 1999 and 28 Feb 2001.","Single prescribed remedy: compliance requires action in accordance with Socata Service Bulletin SB 10-120-32, reducing technical ambiguity.","Clear compliance window: next scheduled maintenance after 4 Oct 2001 or before 31 Mar 2002 limits timing disputes.","Reliance on external document: essential instructions are in the manufacturer’s service bulletin, so regulators defer technical detail to the manufacturer.","Traceability burden: operators must verify parts delivery dates to determine applicability, creating administrative effort.","Potential cost and operational impact: inspection/repair/replacement costs and required scheduling of maintenance visits fall to owners/operators."],"plain_english_summary":"CASA has issued an Airworthiness Directive requiring Aerospatiale (Socata) TB9 and TB10 aircraft with nose‑gear forks delivered as Socata spare parts between 1 Jan 1999 and 28 Feb 2001 to comply with Socata Service Bulletin SB 10‑120‑32. The directive, issued under CASR subregulation 39.1(1), responds to a manufacturing fault and requires action at the next scheduled maintenance after 4 Oct 2001 or before 31 Mar 2002. Owners/operators must arrange inspection/rectification and bear compliance costs; applicability depends on parts traceability."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope: addressing a specific manufacturing defect in a specific aircraft part for specific aircraft models. There is no evidence of scope creep; it remains a targeted safety intervention for the identified unsafe condition."},"complexity_factors":["Single, clearly defined applicability criterion (specific aircraft models with parts from a defined date range)","Only one substantive requirement referencing an external technical document (Service Bulletin)","Simple compliance deadline structure (earlier of two dates)","No defined terms section, no cross-references to other legislation beyond the enabling regulation (CASR 1998 subreg 39.1(1))","Minimal conditional logic (only the 'whichever occurs first' timing provision)","Short document (under 300 words of substantive text)"],"plain_english_summary":"The CASA safety order requires owners/operators of Socata TB9 and TB10 Tobago aircraft to inspect or replace nose‑wheel forks that were supplied as spares between January 1999 and February 2001, following the manufacturer’s Service Bulletin SB 10‑120‑32. A manufacturing defect could cause nose‑gear failure during landing or taxi, so affected aircraft must comply by the next routine maintenance after 4 October 2001 or by 31 March 2002. The order takes effect 4 October 2001 and mirrors DGAC AD 2001‑305(A)."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-tb10-33-nose-gear-fork","history":"/api/acts/ad-tb10-33-nose-gear-fork/history","analysis":"/api/acts/ad-tb10-33-nose-gear-fork/analysis","conflicts":"/api/acts/ad-tb10-33-nose-gear-fork/conflicts","importantCases":"/api/acts/ad-tb10-33-nose-gear-fork/important-cases","documents":"/api/acts/ad-tb10-33-nose-gear-fork/documents"}}