{"id":"F2007L02190","name":"AD/ATR 42/10 - Main Landing Gear Side Brace Lower Arm","slug":"ad-atr-42-10-main-landing-gear-side-brace-lower-arm","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67429,"registerId":"commonwealth-F2007L02190-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Avions de Transport Regional ATR 42 Seri","sectionType":"division","heading":"Avions de Transport Regional ATR 42 Series Aeroplanes","content":"### Avions de Transport Regional ATR 42 Series Aeroplanes\n\n| AD/ATR 42/10 | Main Landing Gear Side Brace Lower Arm | 8/2007 |\n| ------------ | -------------------------------------- | ------ |\n\n| Applicability: | Model ATR 42-200 and -300 series aircraft, equipped with a main landing gear side brace lower arm with part number GA 62045, 62045-1, or 62045-2.                         |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of DGAC AD 91-033-038(B) R2.Note: ATR Service Bulletin ATR42-32-0036 Revision 3, or later DGAC/EASA approved revision, refers. |\n| Compliance:    | As specified in the Requirement document.                                                                                                                                 |\n|                | This Airworthiness Directive becomes effective on 2 August 2007.                                                                                                          |\n| Background:    | The DGAC requires certain actions to prevent main landing gear collapse due to failure of the side brace lower arm.                                                       |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n22 June 2007","sortOrder":0},{"sectionNumber":"AD/ATR 42/10","sectionType":"part","heading":"AD/ATR 42/10","content":"## AD/ATR 42/10","sortOrder":1},{"sectionNumber":"Main Landing Gear Side Brace Lower Arm","sectionType":"part","heading":"Main Landing Gear Side Brace Lower Arm","content":"## Main Landing Gear Side Brace Lower Arm","sortOrder":2},{"sectionNumber":"8/2007","sectionType":"part","heading":"8/2007","content":"## 8/2007","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive targeting a specific mechanical defect in specific aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 3 specific part numbers identified as affected","Single requirement: comply with an external French DGAC directive","No defined terms section","No nested exceptions or conditional logic","Cross-reference to only one external technical document (ATR Service Bulletin)","Straightforward applicability test (specific aircraft models + specific part numbers)"],"plain_english_summary":"This AD mandates inspection and corrective action for the main landing gear side brace lower arm on ATR 42-200/-300 aircraft that have parts GA 62045, 62045-1, or GA 62045-2, to prevent possible gear collapse. Operators must comply with DGAC AD 91-033-038(B) R2 and ATR’s Service Bulletin ATR42-32-0036 Rev 3 for the required procedures.\n\nIt’s compulsory for affected owners/operators and took effect 2 August 2007."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD adopts and enforces the DGAC-prescribed measures for the specified ATR 42 models and part numbers without expanding the population or adding new types of measures. It references the DGAC AD and the ATR service bulletin for the required inspections and corrective work, and sets an Australian effective date (2 August 2007). The directive does not, on its face, broaden scope beyond the foreign directive and the listed parts/models (Applicability; Requirement; Compliance; Effective date)."},"complexity_factors":["Narrow technical applicability limited to ATR 42-200 and -300 models with side brace lower arm part numbers GA 62045, 62045-1, GA 62045-2 (Applicability).","Mandates actions by reference to an external foreign authority directive (DGAC AD 91-033-038(B) R2) rather than reproducing procedures, creating dependency on external documents (Requirement).","Also depends on a manufacturer service bulletin (ATR42-32-0036 Rev 3) or later DGAC/EASA-approved revisions, so procedural detail and any changes live outside this instrument (Requirement / Note).","Compliance timing and exact tasks are described in the referenced documents rather than in the AD itself, which can create practical ambiguity for operators until they consult those materials (Compliance).","Technical remedy (inspection/repair/replacement) addresses a safety-critical component (main landing gear side brace lower arm), increasing operational and parts‑replacement costs for affected operators (Background).","Regulatory enforcement and legal effect are through CASA via the Delegate's instrument; domestic enforcement is clear but discretion over approvals rests with CASA/DGAC/EASA processes (effective date and signature)."],"plain_english_summary":"This Airworthiness Directive requires operators of ATR 42-200 and -300 aeroplanes fitted with main landing gear side brace lower arms (part numbers GA 62045, 62045-1, GA 62045-2) to carry out the inspections and corrective actions set out in DGAC AD 91-033-038(B) R2 and the referenced ATR Service Bulletin (ATR42-32-0036 Rev 3). It takes effect on 2 August 2007.\n\nMechanically, it compels inspections, repairs or replacement to prevent side‑brace failure and landing‑gear collapse. Aircraft operators bear the compliance costs and must follow the externally specified DGAC/EASA‑approved procedures; CASA enforces the directive."},"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-atr-42-10-main-landing-gear-side-brace-lower-arm","history":"/api/acts/ad-atr-42-10-main-landing-gear-side-brace-lower-arm/history","analysis":"/api/acts/ad-atr-42-10-main-landing-gear-side-brace-lower-arm/analysis","conflicts":"/api/acts/ad-atr-42-10-main-landing-gear-side-brace-lower-arm/conflicts","importantCases":"/api/acts/ad-atr-42-10-main-landing-gear-side-brace-lower-arm/important-cases","documents":"/api/acts/ad-atr-42-10-main-landing-gear-side-brace-lower-arm/documents"}}