{"id":"F2006B10770","name":"AD/IAI-A/12 - Nose Landing Gear Drag Brace","slug":"ad-iai-a-12-nose-landing-gear-drag-brace","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56220,"registerId":"commonwealth-F2006B10770-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.002.png)\n\n![](image.002.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.","sortOrder":0},{"sectionNumber":"AD/IAI-A/12 Nose Landing Gear Drag Brace","sectionType":"part","heading":"AD/IAI-A/12 Nose Landing Gear Drag Brace 9/2001","content":"# ![](image.003.png)AD/IAI-A/12 Nose Landing Gear Drag Brace 9/2001\n\nDM\n\nApplicability: Model 1125 Astra aircraft, serial numbers 004 through 039; equipped with a nose landing gear drag brace having IAI part numbers 25W272003-501 through \\-507 (SHL part number 248-0000-00).\n\nModel 1125 Astra and Astra SPX aircraft with serial numbers higher than 039 which have had the complete nose landing gear or the drag brace replaced, must be checked for applicability.\n\nRequirement: Perform a visual and eddy current inspection of the upper radius of the nose landing gear drag brace in accordance with Israel Aircraft Industries Astra Alert Service Bulletin No. 1125-32A-095.\n\nNote 1: Installation of drag brace IAI part number 25W272007-501 (SHL part number 3531-0000-00) constitutes terminating action for the requirements of this Directive.\n\nNote 2: Israel CAA AD 32-00-12-14 refers.\n\nCompliance: Unless accomplished within the last 250 hours time in service, within 25 hours time in service after 25 July 2001. Thereafter, inspect per Chapters 5 and 32 of the Astra Maintenance Manual including Temporary Revision 32-7, dated 28 November 2000.\n\nThis Airworthiness Directive becomes effective on 25 July 2001.\n\n![](image.004.png)Background: Cracks have been found on the fillet between the trunnion axis and the body on affected nose landing gear drag braces. Undetected fatigue cracking could result in failure of the drag brace and collapse of the nose landing gear.\n\n![](image.005.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 17 July 2001\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 25 July 2001.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No change: the AD applies to the listed serial numbers and to later aircraft only if the nose landing gear or drag brace was replaced; it prescribes inspection actions and allows a specified part replacement as terminating action."},"complexity_factors":["Defined applicability tied to serial numbers and to aircraft with replaced nose gear/drag brace (Applicability)","Technical inspection methods require eddy‑current and visual checks and reference an external IAI Alert Service Bulletin (Requirement)","Terminating action via specified replacement part (Note 1) introduces an alternative compliance path","Compliance timing has a short mandatory window (25 hours) unless a recent inspection exists (250 hours), then ongoing manual-based inspection regime (Compliance)","Cross-references to Astra Maintenance Manual chapters and an Israel CAA AD increase reliance on external documents (Notes/Compliance)"],"plain_english_summary":"This Airworthiness Directive requires operators of IAI Model 1125 Astra (S/N 004–039, and later aircraft if nose gear/drag brace were replaced) to do a visual and eddy‑current inspection of the drag‑brace upper radius per IAI Alert Service Bulletin 1125‑32A‑095. Replacing the brace with IAI P/N 25W272007‑501 ends the requirement. Effective 25 July 2001.\n\nIt affects owners, operators and maintenance organisations: inspections must occur within 25 flight hours unless done in the previous 250 hours, then follow the Astra Maintenance Manual. Operators pay inspection and replacement costs; CASA enforces compliance."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope. It addresses a specific fatigue cracking issue in a particular aircraft component, exactly as intended when issued. The conditional applicability for later serial numbers (checking if gear was replaced) is a standard safety inclusion to catch edge cases, not scope creep."},"complexity_factors":["Single, specific mechanical defect addressed with clear inspection protocol","Limited applicability: only 36 specific aircraft serial numbers plus conditional later models","Only 2 defined part number ranges to check for applicability","Straightforward compliance timeline: 25 hours after effective date or 250 hours since last inspection","Single terminating action (replacement part) clearly identified","No nested exceptions or conditional logic beyond basic applicability check","Cross-reference to only one external document (Israeli CAA AD) and one service bulletin","Total length: approximately 300 words of substantive text"],"plain_english_summary":"This CASA safety order requires owners/operators of certain IAI Astra business jets to inspect the nose landing gear drag brace (visual and eddy‑current checks) after cracks were found at the fillet that could cause gear collapse. It applies to specific serial-number ranges and to later aircraft with replaced braces of listed part numbers, with inspections due within 25 flight hours after 25 July 2001 unless recently checked. Fitting the improved part ends the requirement."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-iai-a-12-nose-landing-gear-drag-brace","history":"/api/acts/ad-iai-a-12-nose-landing-gear-drag-brace/history","analysis":"/api/acts/ad-iai-a-12-nose-landing-gear-drag-brace/analysis","conflicts":"/api/acts/ad-iai-a-12-nose-landing-gear-drag-brace/conflicts","importantCases":"/api/acts/ad-iai-a-12-nose-landing-gear-drag-brace/important-cases","documents":"/api/acts/ad-iai-a-12-nose-landing-gear-drag-brace/documents"}}