{"id":"F2007L02189","name":"AD/ATR 42/11 - Structural Modification","slug":"ad-atr-42-11-structural-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67426,"registerId":"commonwealth-F2007L02189-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 42/11 | Structural Modification | 8/2007 |\n| ------------ | ----------------------- | ------ |\n\n| Applicability: | Model ATR 42 aircraft, serial numbers 3 through 152.                                                                                                             |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of DGAC AD 89-017-017(B) R2.                                                                                          |\n| Compliance:    | As specified in the Requirement document.                                                                                                                        |\n|                | This Airworthiness Directive becomes effective on 2 August 2007.                                                                                                 |\n| Background:    | During aircraft fatigue testing, damage was detected in certain fuselage and wing locations. This Directive requires modification actions to affected locations. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n22 June 2007","sortOrder":0},{"sectionNumber":"AD/ATR 42/11","sectionType":"part","heading":"AD/ATR 42/11","content":"## AD/ATR 42/11","sortOrder":1},{"sectionNumber":"Structural Modification","sectionType":"part","heading":"Structural Modification","content":"## Structural Modification","sortOrder":2},{"sectionNumber":"8/2007","sectionType":"part","heading":"8/2007","content":"## 8/2007","sortOrder":3}],"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with a narrow, specific scope: addressing identified fatigue damage in a particular aircraft type. It has not expanded beyond its original safety purpose. The directive maintains its focused intent of mandating structural modifications based on testing results."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only one substantive requirement: compliance with an external French directive (DGAC AD 89-017-017(B) R2)","No defined terms section — relies entirely on external technical reference","Simple applicability criteria (specific model and serial number range)","No conditional logic, exceptions, or nested provisions","Single compliance pathway with no alternatives or phased implementation described in the directive itself"],"plain_english_summary":"This CASA Airworthiness Directive mandates structural modifications to early ATR 42 aircraft (serial numbers 3–152) to repair fatigue damage found in fuselage and wing testing. Operators must comply with the technical requirements referenced in DGAC AD 89‑017‑017(B) R2. \n\nIt protects structural integrity and prevents crack-related failures; the AD took effect 2 August 2007."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument specifies affected models/serial numbers and mandates modifications per DGAC AD 89-017-017(B) R2; the text contains no indication that the scope differs from its original intent."},"complexity_factors":["Cross-reference to DGAC AD 89-017-017(B) R2 for the actual technical requirements (compliance depends on an external document).","Narrow applicability by serial number (models ATR 42, s/n 3–152) requires fleet-level identification and tracking.","Subject-matter is technical (structural fatigue in fuselage and wing) requiring specialist engineering and maintenance work.","Implementation details, timing and procedures are delegated to the referenced Requirement document rather than spelled out in this directive.","Effective date (2 August 2007) imposes a defined compliance timeline that affects scheduling and aircraft availability."],"plain_english_summary":"This Airworthiness Directive mandates structural modification work on Avions de Transport Régional ATR 42 aeroplanes, serial numbers 3–152, carried out in accordance with DGAC AD 89‑017‑017(B) R2. It responds to fatigue-test damage found in fuselage and wing locations and took effect on 2 August 2007. The directive requires affected aircraft to undergo specified repairs, creating direct maintenance and compliance costs and affecting operators’ maintenance planning and aircraft availability."}},"importantCases":[],"_links":{"self":"/api/acts/ad-atr-42-11-structural-modification","history":"/api/acts/ad-atr-42-11-structural-modification/history","analysis":"/api/acts/ad-atr-42-11-structural-modification/analysis","conflicts":"/api/acts/ad-atr-42-11-structural-modification/conflicts","importantCases":"/api/acts/ad-atr-42-11-structural-modification/important-cases","documents":"/api/acts/ad-atr-42-11-structural-modification/documents"}}