{"id":"F2012L01540","name":"AD/B747/15 Amdt 2 - Trailing Edge Flap Track Fuse Bolt - Inspection/Replacement","slug":"ad-b747-15-amdt-2-trailing-edge-flap-track-fuse-bolt-inspection-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":89521,"registerId":"commonwealth-F2012L01540-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 747 Series Aeroplanes","sectionType":"division","heading":"Boeing 747 Series Aeroplanes","content":"### Boeing 747 Series Aeroplanes\n\n| AD/B747/15 Amdt 2 | Trailing Edge Flap Track FuseBolt - Inspection / Replacement | 14/2012 |\n| ----------------- | ------------------------------------------------------------ | ------- |\n\n| Applicability: | All model Boeing 747 series aeroplanes certificated in all categories listed in Boeing Service Bulletin 747-57-2206, Revision 2, and Service Bulletin 747-57-2217, Revision 4, or later FAA approved revisions.                                       |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of FAA AD 83-08-02.Note: FAA AD 83-08-02 mandates Boeing Service Bulletin 747-57-2206, Revision 1, and Service Bulletin 747-57-2217, Revision 1, or later FAA approved revisions.                          |\n| Compliance:    | As detailed in the Requirement document                                                                                                                                                                                                               |\n|                | This Amendment becomes effective on 18 July 2012.                                                                                                                                                                                                     |\n| Background:    | Amendment 1 of this Directive introduced Boeing SB 747-57-2206, Revision 1 which superseded the original issue of SB 747-57-2177.Amendment 2 removes reference to Boeing SB 747-57-2206, Revision 1 and introduces FAA AD 83-08-02 under Requirement. |\n\n![](image.001.png)\n\nPeter Nikolic  \nDelegate of the Civil Aviation Safety Authority\n\n10 July 2012","sortOrder":0},{"sectionNumber":"AD/B747/15 Amdt 2","sectionType":"part","heading":"AD/B747/15 Amdt 2","content":"## AD/B747/15 Amdt 2","sortOrder":1},{"sectionNumber":"Trailing Edge Flap Track Fuse Bolt - Ins","sectionType":"part","heading":"Trailing Edge Flap Track Fuse Bolt - Inspection / Replacement","content":"## Trailing Edge Flap Track Fuse  \nBolt - Inspection / Replacement","sortOrder":2},{"sectionNumber":"14/2012","sectionType":"part","heading":"14/2012","content":"## 14/2012","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original scope — mandating safety inspections for Boeing 747 flap track fuse bolts. Amendment 2 is a procedural update that changes how the requirements are referenced (via FAA AD rather than direct SB reference) but does not expand the aircraft covered, the components affected, or the nature of the required actions."},"complexity_factors":["Heavy reliance on external documents (FAA AD 83-08-02 and Boeing Service Bulletins) — the actual technical requirements are not contained in this instrument","Multiple revision numbers referenced (Revision 1, 2, 4) creating version control complexity","Cross-referential structure: Australian AD → FAA AD → Boeing Service Bulletins","Amendment history requires understanding what changed from Amendment 1 to Amendment 2","Technical aviation terminology (fuse bolts, trailing edge flap tracks, service bulletins) assumes specialised knowledge"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and, if needed, replacement of trailing-edge flap track fuse bolts on affected Boeing 747s, requiring operators to follow FAA AD 83-08-02 and the Boeing service bulletins it mandates. It applies to all covered 747s operating in Australia.\n\nThis matters because fuse bolts protect wing structure under abnormal flap loads; compliance is mandatory for safety and legal operation. Amendment 2 replaces a direct bulletin reference with the FAA AD."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 2 removes the prior direct reference to Boeing Service Bulletin 747-57-2206 Revision 1 and replaces the requirement with compliance with FAA AD 83-08-02. Mechanically this shifts the directive from citing a specific Boeing SB revision to requiring adherence to the FAA AD (Background; Requirement; Note)."},"complexity_factors":["Cross-reference to an external FAA airworthiness directive (`FAA AD 83-08-02`) rather than containing full technical instructions (Requirement; Note)","Incorporation by reference of Boeing service bulletins (747-57-2206, 747-57-2217) that set technical scope and applicability (Applicability)","Narrow technical subject matter (single component: trailing edge flap track fuse bolt) reduces substantive complexity","Administrative amendment (removes previous SB reference and introduces FAA AD) lowers interpretive ambiguity but requires checking multiple documents (Background)","Compliance and enforcement delegated to standard CASA processes; effective date imposes a fixed implementation timeline (Compliance; Effective date)","Cost and operational impact concentrate on operators (inspection/replacement costs) rather than on broad stakeholder groups (Requirement; Applicability)"],"plain_english_summary":"This amendment requires operators of all Boeing 747 series aeroplanes listed in Boeing Service Bulletins 747‑57‑2206 Rev 2 and 747‑57‑2217 Rev 4 to inspect or replace trailing‑edge flap track fuse bolts by complying with `FAA AD 83-08-02`; it takes effect 18 July 2012. Operators pay for inspections and any replacements and must follow the FAA‑mandated service bulletins; the Civil Aviation Safety Authority enforces compliance (Applicability; Requirement; Compliance)."},"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-b747-15-amdt-2-trailing-edge-flap-track-fuse-bolt-inspection-replacement","history":"/api/acts/ad-b747-15-amdt-2-trailing-edge-flap-track-fuse-bolt-inspection-replacement/history","analysis":"/api/acts/ad-b747-15-amdt-2-trailing-edge-flap-track-fuse-bolt-inspection-replacement/analysis","conflicts":"/api/acts/ad-b747-15-amdt-2-trailing-edge-flap-track-fuse-bolt-inspection-replacement/conflicts","importantCases":"/api/acts/ad-b747-15-amdt-2-trailing-edge-flap-track-fuse-bolt-inspection-replacement/important-cases","documents":"/api/acts/ad-b747-15-amdt-2-trailing-edge-flap-track-fuse-bolt-inspection-replacement/documents"}}