{"id":"F2009L00509","name":"AD/ATR 42/25 - Wire Bundles in the Rear Baggage Zone","slug":"ad-atr-42-25-wire-bundles-in-the-rear-baggage-zone","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":77159,"registerId":"commonwealth-F2009L00509-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 42/25 | Wire Bundles in the Rear Baggage Zone | 3/2009 |\n| ------------ | ------------------------------------- | ------ |\n\n| Applicability: | ATR 42-500 aircraft, with Manufacturer Serial Numbers (MSN) 667, 669 and 671. |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Verify the installation of the appropriate protection sleeves and the correct routing and clamping of the wire bundles in accordance with the accomplishment instructions of ATR Service Bulletin ATR42-92-0020 dated 17 October 2008 or later revision approved by the European Aviation Safety Agency (EASA). |\n| | 2. If any discrepancy is found during the Requirement verification, accomplish all corrective actions as instructed in the ATR Service Bulletin ATR42-92-0020 or later revision approved by the EASA. |\n| | Note: EASA AD 2008-0218 refers. |\n| Compliance: | For Requirement 1 - Within 550 hours time in service after the effective date of this Directive. |\n| | For Requirement 2 - Before further flight after the Requirement 1 verification. |\n| | This Airworthiness Directive becomes effective on 12 March 2009. |\n| Background: | Identification of an unsafe condition related to the loss of the fail-safe design criteria for the rudder trim, pitch trim and stick pusher control functions after a reported event led in April 2008 to the release of AD/ATR 42/23 (EASA AD 2008-0062) to mandate ATR modification 05780.It has appeared that some aircraft manufactured and delivered before the 1 April 2008 may have received on the production-line a partial or incorrect implementation of the required ATR modification 05780. This Directive requires an inspection of the identified aircraft to verify and, finalize when necessary, the complete and correct implementation of the ATR modification 05780. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n27 January 2009","sortOrder":0},{"sectionNumber":"AD/ATR 42/25","sectionType":"part","heading":"AD/ATR 42/25","content":"## AD/ATR 42/25","sortOrder":1},{"sectionNumber":"Wire Bundles in the Rear Baggage Zone","sectionType":"part","heading":"Wire Bundles in the Rear Baggage Zone","content":"## Wire Bundles in the Rear Baggage Zone","sortOrder":2},{"sectionNumber":"3/2009","sectionType":"part","heading":"3/2009","content":"## 3/2009","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This Directive narrows follow-up action from the earlier mandate to fit modification 05780 by targeting verification and completion on a limited set of aircraft that may have received the modification partially or incorrectly (Background). It does not reissue the broad modification requirement but requires inspection and corrective work on MSNs 667, 669 and 671 to confirm and finalise the earlier modification."},"complexity_factors":["Narrow applicability to only three specific MSNs (Applicability).","Prescriptive technical action tied to an external service bulletin (Requirement: ATR Service Bulletin ATR42-92-0020).","Dependency on EASA approval for later revisions of the service bulletin (Requirement note).","Short but routine compliance window for inspection (550 hours time in service) and immediate correction before further flight if discrepancies are found (Compliance).","Root cause tied to prior mandated production modification 05780 and verification that it was correctly implemented (Background).","Implementation requires qualified maintenance personnel and access to the specified SB; potential temporary grounding if corrective work is needed (implied by Requirement 2 and Compliance)."],"plain_english_summary":"This Airworthiness Directive requires operators of three ATR 42-500 aeroplanes (MSN 667, 669 and 671) to inspect the wire bundles in the rear baggage zone and confirm protection sleeves, routing and clamping match ATR Service Bulletin ATR42-92-0020 (or later EASA-approved revision). Any discrepancies must be fixed before further flight. The measure targets aircraft that may have received an incomplete or incorrect production modification (ATR modification 05780) that could affect fail‑safe behaviour of trim and stick‑pusher controls."},"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 targeted safety directive addressing a specific manufacturing defect in three identified aircraft. The scope remains precisely limited to verifying and completing a previously mandated modification. There is no evidence of scope creep; the instrument serves its original narrow safety purpose."},"complexity_factors":["Very narrow applicability — only 3 specific aircraft serial numbers","Single technical requirement referencing an external service bulletin (ATR42-92-0020)","Simple two-step compliance structure (inspect, then repair if needed)","No defined terms section, no cross-references to other legislation beyond the referenced EASA AD and service bulletin","Straightforward time-based compliance (550 hours) with immediate corrective action trigger","Total length is approximately 300 words"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of three ATR 42-500s (S/N 667, 669, 671) to inspect rear baggage‑compartment wiring that serves rudder trim, pitch trim and the stick pusher. A factory modification may have been incomplete or incorrect, risking loss of those control functions. The wiring must be checked within 550 flight hours from 12 March 2009 and any defects repaired before the aircraft next flies."}},"importantCases":[],"_links":{"self":"/api/acts/ad-atr-42-25-wire-bundles-in-the-rear-baggage-zone","history":"/api/acts/ad-atr-42-25-wire-bundles-in-the-rear-baggage-zone/history","analysis":"/api/acts/ad-atr-42-25-wire-bundles-in-the-rear-baggage-zone/analysis","conflicts":"/api/acts/ad-atr-42-25-wire-bundles-in-the-rear-baggage-zone/conflicts","importantCases":"/api/acts/ad-atr-42-25-wire-bundles-in-the-rear-baggage-zone/important-cases","documents":"/api/acts/ad-atr-42-25-wire-bundles-in-the-rear-baggage-zone/documents"}}