{"id":"F2008L00496","name":"AD/J4100/7 - Cargo Doors","slug":"ad-j4100-7-cargo-doors","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119316,"registerId":"commonwealth-F2008L00496-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"BAe Systems (Operations) Jetstream 4100 ","sectionType":"division","heading":"BAe Systems (Operations) Jetstream 4100 Series Aeroplanes","content":"### BAe Systems (Operations) Jetstream 4100 Series Aeroplanes\n\n| AD/J4100/7 | Cargo Doors | 4/2008 DM |\n| ---------- | ----------- | --------- |\n\n| Applicability: | All Model Jetstream Series 4100 aircraft that are post modification JM41036B or which have Service Bulletin J41-53-008 (Mod JM41036A) accomplished.                                                                                                                                                                                                                                                                                                           |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with BAe Regional Aircraft Mandatory Service BulletinJ41-52-060 original issue, or later CAA/EASA approved revision.Note: UK CAA AD 005-08-98 refers.                                                                                                                                                                                                                                                                                    |\n| Compliance:    | For Part 1 of the Requirement document:Unless already accomplished, within 30 days after 20 February 2008; thereafter whenever a failed counter-balance motor is identified by Part 2 of the Requirement Document.For Part 2 of the Requirement document:Unless already accomplished, within 30 days after 20 February 2008, and thereafter at intervals not to exceed 5 days. A failed counter-balance motor must be replaced or repaired within 10 flights. |\n|                | This Airworthiness Directive becomes effective on 20 February 2008.                                                                                                                                                                                                                                                                                                                                                                                           |\n| Background:    | The manufacturer received a report of damage to a sub-frame that supports the bottom aft roller of the main baggage bay door. The sub-frame is primary structure of the door and failure of the sub-frame could allow other structure to fail. Failure of the door structure could cause a sudden loss of cabin pressure.                                                                                                                                     |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n15 February 2008","sortOrder":0},{"sectionNumber":"AD/J4100/7","sectionType":"part","heading":"AD/J4100/7","content":"## AD/J4100/7","sortOrder":1},{"sectionNumber":"Cargo Doors","sectionType":"part","heading":"Cargo Doors","content":"## Cargo Doors","sortOrder":2},{"sectionNumber":"4/2008 DM","sectionType":"part","heading":"4/2008 DM","content":"## 4/2008 DM","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: addressing a specific structural defect in cargo doors of a particular aircraft model. No scope creep detected."},"complexity_factors":["Short, single-purpose instrument (approximately 250 words)","Only 2 defined applicability conditions (modification status)","Clear two-part requirement structure with specific timeframes","Single cross-reference to UK CAA AD 005-08-98 and manufacturer service bulletin","No nested exceptions or conditional logic beyond the initial applicability test","Technical aviation terminology requires domain knowledge but is standard for the industry"],"plain_english_summary":"This AD mandates urgent inspections and corrective action on certain BAe Jetstream 4100 aircraft that have had modification JM41036B or service bulletin J41-53-008 applied, addressing a cracking sub-frame that supports the baggage door roller.  \n\nBy requiring regular checks of the door sub-frame and counter-balance motor and prompt repair or replacement if faults are found, it prevents possible in-flight cargo door failure and sudden cabin depressurisation that could endanger occupants."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The Directive defines a specific, limited scope (Jetstream 4100 aircraft post specified modifications) and prescribes remedial inspections and repairs to address reported sub-frame damage. The text gives no indication it broadens or narrows an earlier instrument’s scope; it implements corrective measures for the identified defect (Applicability; Requirement; Background)."},"complexity_factors":["Cross-reference to a manufacturer Mandatory Service Bulletin and to CAA/EASA-approved revisions (Requirement)","Narrow applicability tied to specific modifications (Applicability)","Multiple, staggered compliance timings (initial 30 days; recurring ≤5 days) and a separate 10-flight repair window (Compliance)","Safety-driven mandatory maintenance actions that create ongoing operational burden for operators (Compliance; Background)","Reference to an external foreign AD (UK CAA AD 005-08-98) increasing regulatory cross-jurisdictional considerations"],"plain_english_summary":"This Airworthiness Directive applies to Jetstream 4100 aircraft modified by JM41036B or JM41036A (Service Bulletin J41-53-008) and requires operators to carry out actions in BAe Mandatory Service Bulletin J41-52-060 (or later CAA/EASA-approved revision) (Applicability; Requirement). It imposes short-term inspection and replacement rules (Compliance): initial actions within 30 days, recurring checks as often as every 5 days, and repair/replacement of a failed counter-balance motor within 10 flights. Operators pay for inspections and repairs; the regulator enforces compliance (Compliance; Background)."},"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-j4100-7-cargo-doors","history":"/api/acts/ad-j4100-7-cargo-doors/history","analysis":"/api/acts/ad-j4100-7-cargo-doors/analysis","conflicts":"/api/acts/ad-j4100-7-cargo-doors/conflicts","importantCases":"/api/acts/ad-j4100-7-cargo-doors/important-cases","documents":"/api/acts/ad-j4100-7-cargo-doors/documents"}}