{"id":"F2007L02136","name":"AD/ATR 42/4 - Passenger/Crew Door Lifting Device","slug":"ad-atr-42-4-passenger-crew-door-lifting-device","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67302,"registerId":"commonwealth-F2007L02136-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 42/4 | Passenger/Crew Door Lifting Device | 8/2007 |\n| ----------- | ---------------------------------- | ------ |\n\n| Applicability: | ATR 42-300 and -320 aircraft that incorporate Service Bulletin (SB) ATR42-52-0019 (mod 1236) and have not incorporated ATR SB 42-52-0043 (mod 2440).                                                                                                                                                                                                                                                                                                                    |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect and if required, repair the passenger/crew door lifting device compensation rod and its fail safe cable in accordance with paragraph A of SB ATR 42-52-0042 or later NAA approved revision.2. Carry out installation of the improved passenger/crew door lifting device compensation rod and its fail safe cable as detailed in paragraph B of SB ATR 42-52-0042 or later NAA approved revision.Note: DGAC AD 89-138-024(B)R1 dated 21 February 1990 refers. |\n| Compliance:    | 1. Initial inspection within 30 days of the effective date of this AD, unless previously accomplished, thereafter at intervals not to exceed 250 flight hours.2. Within 30 days after the effective date of this AD, unless previously accomplished.                                                                                                                                                                                                                    |\n|                | This Airworthiness Directive becomes effective on 2 August 2007.                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Background:    | The requirements of this AD are intended to prevent simultaneous rupture of the passenger/crew door lifting device and its fails safe cable.                                                                                                                                                                                                                                                                                                                            |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n21 June 2007","sortOrder":0},{"sectionNumber":"AD/ATR 42/4","sectionType":"part","heading":"AD/ATR 42/4","content":"## AD/ATR 42/4","sortOrder":1},{"sectionNumber":"Passenger/Crew Door Lifting Device","sectionType":"part","heading":"Passenger/Crew Door Lifting Device","content":"## Passenger/Crew Door Lifting Device","sortOrder":2},{"sectionNumber":"8/2007","sectionType":"part","heading":"8/2007","content":"## 8/2007","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD's scope matches its stated purpose in the Background: it targets a specific subset of the ATR 42 fleet and mandates inspection, repair and installation to prevent simultaneous rupture of the door lifting device and failsafe cable. It does not extend beyond those mechanical mitigation measures or the identified aircraft population."},"complexity_factors":["Narrow applicability (Applicability): applies only to ATR 42-300/-320 aircraft with SB ATR42-52-0019 (mod 1236) that have not incorporated SB ATR42-52-0043 (mod 2440)","Technical work governed by an external Service Bulletin (Requirement): inspections, repairs and installation must follow SB ATR 42-52-0042 or a later NAA-approved revision","Recurring inspection burden (Compliance): initial inspection within 30 days and repeat intervals not exceeding 250 flight hours","Short installation deadline (Compliance): installation required within 30 days of the AD effective date","Conditional repair obligation (Requirement): repair only 'if required' on inspection, leaving judgement and action to operators/maintenance organisations","Regulatory coordination (Requirement/Background): references prior DGAC AD and allows later NAA-approved SB revisions, creating dependency on authority approvals","Operational impacts implied: aircraft downtime, parts/maintenance scheduling and cost to operators are required to meet deadlines"],"plain_english_summary":"This directive requires operators of ATR 42‑300 and ‑320 aircraft that have SB ATR42‑52‑0019 (mod 1236) but not SB ATR42‑52‑0043 (mod 2440) to inspect, repair if needed, and install an improved passenger/crew door lifting device compensation rod and its failsafe cable. Inspections must start within 30 days and recur no more than every 250 flight hours, with installation due within 30 days. The stated aim is to prevent simultaneous rupture of the rod and its failsafe cable (Applicability; Requirement; Compliance; Background)."},"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 2 main requirements with clear compliance deadlines","Limited applicability criteria (specific aircraft models with specific modification status)","Single cross-reference to a French aviation authority document (DGAC AD 89-138-024(B)R1)","No nested exceptions or conditional logic beyond the applicability test","Technical but straightforward mechanical requirements"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of ATR 42-300/-320 aircraft that have the earlier Service Bulletin modification but not mod 2440 to inspect the door compensation rod and fail‑safe cable within 30 days and every 250 flight hours, and to replace them with improved parts within 30 days. It addresses a design weakness that could allow both primary and backup door lifting components to fail simultaneously, risking in‑flight door failure and potential rapid decompression."},"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-atr-42-4-passenger-crew-door-lifting-device","history":"/api/acts/ad-atr-42-4-passenger-crew-door-lifting-device/history","analysis":"/api/acts/ad-atr-42-4-passenger-crew-door-lifting-device/analysis","conflicts":"/api/acts/ad-atr-42-4-passenger-crew-door-lifting-device/conflicts","importantCases":"/api/acts/ad-atr-42-4-passenger-crew-door-lifting-device/important-cases","documents":"/api/acts/ad-atr-42-4-passenger-crew-door-lifting-device/documents"}}