{"id":"F2010L02754","name":"AD/JETSTREAM/11 Amdt 2 - Nose Equipment Bay Spine Member","slug":"ad-jetstream-11-amdt-2-nose-equipment-bay-spine-member","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":84712,"registerId":"commonwealth-F2010L02754-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"British Aerospace BAe 3100 (Jetstream) S","sectionType":"division","heading":"British Aerospace BAe 3100 (Jetstream) Series Aeroplanes","content":"### British Aerospace BAe 3100 (Jetstream) Series Aeroplanes\n\n| AD/JETSTREAM/11 Amdt 2 | Nose Equipment Bay Spine Member | 21/2010 |\n| ---------------------- | ------------------------------- | ------- |\n\n| Applicability: | Applicable to aircraft HP137 Mk1, Jetstream Series 200 and Jetstream Series 3100, constructor’s numbers 601 to 614 inclusive, 616 and 617, unless modified in accordance with British Aerospace Service Bulletin Jetstream 53-JM5224.                                                                                                                                                                                                               |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | British Aerospace Alert Service Bulletin Jetstream 53-A-JA850610.Note: UK CAA AD 015-09-85 refers.                                                                                                                                                                                                                                                                                                                                                  |\n| Compliance:    | As specified in the Requirement document.                                                                                                                                                                                                                                                                                                                                                                                                           |\n|                | This Amendment becomes effective on 29 October 2010.Inspection in accordance with Amdt 1 of this Directive constitutes inspection in accordance with Amdt 2.                                                                                                                                                                                                                                                                                        |\n| Background:    | The Jetstream fatigue test identified cracks in the inner skin of the nose equipment bay spine in the area of the nose equipment bay door, front and rear hinge positions.Amendment 1 introduced a modification kit which, when installed in accordance with 53-JM5224, eliminated the requirement for repetitive inspections.This Amendment corrects an error in specification of the Requirement document, and adds a reference to the UK CAA AD. |\n\n![](image.001.png)\n\nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n15 October 2010","sortOrder":0},{"sectionNumber":"AD/JETSTREAM/11 Amdt 2","sectionType":"part","heading":"AD/JETSTREAM/11 Amdt 2","content":"## AD/JETSTREAM/11 Amdt 2","sortOrder":1},{"sectionNumber":"Nose Equipment Bay Spine Member","sectionType":"part","heading":"Nose Equipment Bay Spine Member","content":"## Nose Equipment Bay Spine Member","sortOrder":2},{"sectionNumber":"21/2010","sectionType":"part","heading":"21/2010","content":"## 21/2010","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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Amendment 2 corrects an error in the Requirement document and adds a reference to the UK CAA AD but does not expand applicability or add new mandatory actions beyond those already set out. (See 'Requirement' — refer to British Aerospace Alert Service Bulletin Jetstream 53‑A‑JA850610 — and 'Background' noting the amendment corrects specification and adds the UK CAA AD; 'Applicability' lists affected constructor numbers; the instrument states that inspections performed under Amdt 1 constitute inspection under Amdt 2.)"},"complexity_factors":["Narrow applicability limited to specific constructor numbers (601–614, 616–617) increases administrative checking burden for operators.","Primary actions are delegated to manufacturer service documents (Alert Service Bulletin 53‑A‑JA850610 and modification kit 53‑JM5224), creating dependency on external technical procedures.","Amendment corrects the Requirement document specification and adds a cross‑reference to a UK CAA AD, requiring readers to compare multiple documents/editions.","Equivalence clause (inspection per Amdt 1 constitutes compliance with Amdt 2) introduces legal/recordkeeping nuance for past inspections.","Safety‑critical subject (fatigue cracks in nose equipment bay spine) raises urgency and potential for operational disruption during inspections/modification.","Effective date and amendment history require tracing which version applies to a given aircraft’s maintenance records."],"plain_english_summary":"This Airworthiness Directive requires operators of specified British Aerospace BAe 3100 (Jetstream) aircraft (constructor numbers 601–614, 616–617) to inspect and, where directed by the manufacturer service documents, modify the nose equipment bay spine because fatigue testing found cracks near the nose‑bay door hinge areas. Compliance must follow British Aerospace Alert Service Bulletin Jetstream 53‑A‑JA850610 (and the modification kit 53‑JM5224); inspections done under the prior amendment meet the new requirement."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the airworthiness directive. It corrects a technical error in the referenced requirement document and adds a cross-reference to the UK CAA AD, but does not expand the applicability, add new inspection requirements, or alter the fundamental safety purpose of the original directive."},"complexity_factors":["Short, single-purpose document (approximately 250 words)","Limited conditional logic: applicability hinges on specific constructor's numbers and modification status","Cross-references to external technical documents (British Aerospace Service Bulletin and Alert Service Bulletin) rather than internal legislative provisions","No defined terms section — relies on aviation industry standard terminology","Simple amendment structure: corrects an error and adds a reference without altering substantive requirements","Clear compliance pathway: either inspect or install modification kit to exit inspection cycle"],"plain_english_summary":"Owners/operators of specific British Aerospace Jetstream (HP137 Mk1, Series 200, Series 3100; constructor’s numbers 601–614, 616–617) must inspect the nose equipment bay spine for fatigue cracks per British Aerospace Alert SB Jetstream 53‑A‑JA850610 Amendment 2 (effective 29 Oct 2010). Cracks found in testing could threaten structural integrity; installing the Service Bulletin 53‑JM5224 modification removes the need for repetitive inspections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-11-amdt-2-nose-equipment-bay-spine-member","history":"/api/acts/ad-jetstream-11-amdt-2-nose-equipment-bay-spine-member/history","analysis":"/api/acts/ad-jetstream-11-amdt-2-nose-equipment-bay-spine-member/analysis","conflicts":"/api/acts/ad-jetstream-11-amdt-2-nose-equipment-bay-spine-member/conflicts","importantCases":"/api/acts/ad-jetstream-11-amdt-2-nose-equipment-bay-spine-member/important-cases","documents":"/api/acts/ad-jetstream-11-amdt-2-nose-equipment-bay-spine-member/documents"}}