{"id":"F2008L00502","name":"AD/J4100/13 - Passenger Door 'G' Lock and Speed Lock Systems","slug":"ad-j4100-13-passenger-door-g-lock-and-speed-lock-systems","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119335,"registerId":"commonwealth-F2008L00502-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/J4100/13 | Passenger Door 'G' Lock and Speed Lock Systems | 4/2008 DM |\n| ----------- | ---------------------------------------------- | --------- |\n\n| Applicability: | All Model Jetstream Series 4100 aircraft.                                                                                                                                                                  |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with BAe Regional Aircraft Mandatory Service BulletinJ41-52-058 Revision 1, or later CAA/EASA approved revision.Note: UK CAA AD 003-08-97 refers.                                     |\n| Compliance:    | Unless the initial requirement is already accomplished, within 30 days after20 February 2008; and thereafter at intervals not to exceed 1500 hours time in service.                                        |\n|                | This Airworthiness Directive becomes effective on 20 February 2008.                                                                                                                                        |\n| Background:    | In-service experience has highlighted the need to improve lubrication of the ‘G’ lock and speed lock systems. The task is changed from the current C Check requirement to a period of increased frequency. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n15 February 2008","sortOrder":0},{"sectionNumber":"AD/J4100/13","sectionType":"part","heading":"AD/J4100/13","content":"## AD/J4100/13","sortOrder":1},{"sectionNumber":"Passenger Door 'G' Lock and Speed Lock S","sectionType":"part","heading":"Passenger Door 'G' Lock and Speed Lock Systems","content":"## Passenger Door 'G' Lock and Speed Lock Systems","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":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive focused on a specific mechanical maintenance task. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 1 defined term implicitly referenced (the service bulletin)","No nested conditional logic or exceptions","Single cross-reference to UK CAA AD 003-08-97 and one service bulletin","Straightforward compliance structure: one action, one deadline, one recurring interval","No interpretation section or extensive definitions"],"plain_english_summary":"CASA requires owners/operators of BAe Jetstream 4100 series aircraft to carry out mandated lubrication and maintenance of the passenger door ‘G’ lock and speed lock per BAe Service Bulletin J41-52-058 Rev 1 (or later). This safety-critical measure—moved to a recurring 1,500 flight-hour interval with first action due within 30 days of 20 Feb 2008—must be complied with or the aircraft is grounded."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The directive alters the maintenance scope by moving lubrication of the ‘G’ lock and speed lock systems from the existing C‑Check schedule to a standalone, more frequent task. Mechanically this means an initial action within 30 days after 20 February 2008 (unless already done) and recurring actions every 1,500 hours TIS, to be performed in accordance with BAe Mandatory Service Bulletin J41-52-058 or a later CAA/EASA‑approved revision. The change increases routine maintenance frequency and associated operator costs and recordkeeping."},"complexity_factors":["Applicability is simple and universal: all Jetstream Series 4100 aircraft (clear scope).","Mandates action by reference to an external document: BAe Mandatory Service Bulletin J41-52-058 Revision 1 (requires access to and reliance on that bulletin).","Allows later CAA/EASA approved revisions (introduces regulatory discretion and version control).","Precise compliance timing: initial action within 30 days after 20 February 2008 unless already done, then recurring at intervals not to exceed 1,500 hours TIS (requires recordkeeping and schedule changes).","Changes maintenance grouping from periodic C Check to more frequent intervals (affects planning and cost allocation).","Cross-reference to UK CAA AD 003-08-97 adds an international regulatory touchpoint for operators operating across jurisdictions.","Enforcement authority is CASA via the Delegate (administrative enforcement channel)."],"plain_english_summary":"This Airworthiness Directive requires operators of all BAe Jetstream 4100 series aircraft to carry out lubrication/maintenance of the passenger door ‘G’ lock and speed lock systems in accordance with BAe Mandatory Service Bulletin J41-52-058 (or a later CAA/EASA‑approved revision). The rule moves the task from a C‑Check grouping to a more frequent schedule: initial action within 30 days after 20 February 2008 (unless already done) and recurring at intervals not to exceed 1,500 flight hours. Operators pay for and schedule the work; CASA enforces compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-j4100-13-passenger-door-g-lock-and-speed-lock-systems","history":"/api/acts/ad-j4100-13-passenger-door-g-lock-and-speed-lock-systems/history","analysis":"/api/acts/ad-j4100-13-passenger-door-g-lock-and-speed-lock-systems/analysis","conflicts":"/api/acts/ad-j4100-13-passenger-door-g-lock-and-speed-lock-systems/conflicts","importantCases":"/api/acts/ad-j4100-13-passenger-door-g-lock-and-speed-lock-systems/important-cases","documents":"/api/acts/ad-j4100-13-passenger-door-g-lock-and-speed-lock-systems/documents"}}