{"id":"F2006B10879","name":"AD/JETSTREAM/11 Amdt 1 - Nose Equipment Bay Spine Member","slug":"ad-jetstream-11-amdt-1-nose-equipment-bay-spine-member","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56399,"registerId":"commonwealth-F2006B10879-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/11 Amdt 1 - Nose Equipment Bay Spine Member","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBritish Aerospace BAe 3100 (Jetstream) Series Aeroplanes\n\nAD/JETSTREAM/11\n\nAmdt 1\n\n  \nNose Equipment Bay Spine Member 2/86\n\nApplicability: 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\nRequirement: British Aerospace Alert Service Bulletin Jetstream 53-A-JAB80610. Compliance: As per Requirement Document.\n\nBackground: The manufacturer has reported that cracks have been found in the inner skin of the nose equipment bay spine in the area of the nose equipment bay door, front and rear hinge position, on the Jetstream Fatigue Test specimen. The manufacturer has now produced a modification kit which, when installed, eliminates the requirement for repetitive inspections.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2005},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This Amendment 1 does not alter the fundamental scope of the original directive. It remains focused on addressing the same safety issue (cracks in the nose equipment bay spine). The amendment simply adds a terminating action (the modification kit) as an alternative to ongoing repetitive inspections, providing operators with a permanent compliance pathway rather than expanding the range of affected aircraft or safety concerns."},"complexity_factors":["Mandatory reference to external technical document (British Aerospace Alert Service Bulletin Jetstream 53-A-JAB80610) which contains the actual compliance instructions","Narrow applicability limited to specific constructor's numbers (601-614, 616, 617)","Conditional exclusion clause for aircraft previously modified per Service Bulletin 53-JM5224","Technical aviation terminology ('nose equipment bay spine', 'fatigue test specimen') requiring domain knowledge"],"plain_english_summary":"This mandatory Airworthiness Directive applies to British Aerospace Jetstream HP137 MK1, Series 200 and 3100 aircraft (serials 601–614, 616, 617) unless already modified per BA SB 53‑JM5224. It requires following BA Alert Service Bulletin 53‑A‑JAB80610: repeated inspections of the nose equipment bay spine for cracking or installation of a manufacturer kit that permanently fixes the defect.\n\nCracks found in fatigue testing could threaten structural integrity; compliance is required to keep your aircraft airworthy."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-11-amdt-1-nose-equipment-bay-spine-member","history":"/api/acts/ad-jetstream-11-amdt-1-nose-equipment-bay-spine-member/history","analysis":"/api/acts/ad-jetstream-11-amdt-1-nose-equipment-bay-spine-member/analysis","conflicts":"/api/acts/ad-jetstream-11-amdt-1-nose-equipment-bay-spine-member/conflicts","importantCases":"/api/acts/ad-jetstream-11-amdt-1-nose-equipment-bay-spine-member/important-cases","documents":"/api/acts/ad-jetstream-11-amdt-1-nose-equipment-bay-spine-member/documents"}}