{"id":"F2009L04594","name":"AD/B747/322 Amdt 1 - Strut Front Spar Chord Assembly","slug":"ad-b747-322-amdt-1-strut-front-spar-chord-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":82455,"registerId":"commonwealth-F2009L04594-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/B747/322 Amdt 1 | Strut Front Spar Chord Assembly | 25/2009 |\n| ------------------ | ------------------------------- | ------- |\n\n| Applicability: | Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, 747SP, and 747SR series aircraft listed in Boeing Alert Service Bulletin 747-54A2224 Rev 1, dated16 November 2006 or later FAA-approved revision.Note: This Directive is only applicable to aircraft equipped with Pratt & Whitney or General Electric engines as nominated in the Alert Service Bulletin.                                                                                                                                                                          |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2007-01-15 Amdt 39-14887.                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Compliance:    | At the intervals specified in FAA AD 2007-01-15. If not already accomplished, prior to initial issue of an Australian certificate of airworthiness.                                                                                                                                                                                                                                                                                                                                                                                             |\n|                | This Amendment becomes effective on 18 December 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n| Background:    | The FAA received a report indicating the front spar chord assembly for strut No. 3 fractured on a Model 747-200B aircraft. Investigation revealed the fitting fractured as a result of fatigue at a critical stress area. Fracture of the front spar chord assembly will result in loss of the strut upper link load path.The original issue of this Directive specified FAA AD 2004-25-05 and Alert Service Bulletin 747-54A2224 at its initial issue.Amendment 1 specifies FAA AD 2007-01-15, and Alert Service Bulletin747-54A2224 at Rev 1. |\n\n![](image.001.png)\n\nWilliam David  \nDelegate of the Civil Aviation Safety Authority\n\n08 December 2009","sortOrder":0},{"sectionNumber":"AD/B747/322 Amdt 1","sectionType":"part","heading":"AD/B747/322 Amdt 1","content":"## AD/B747/322 Amdt 1","sortOrder":1},{"sectionNumber":"Strut Front Spar Chord Assembly","sectionType":"part","heading":"Strut Front Spar Chord Assembly","content":"## Strut Front Spar Chord Assembly","sortOrder":2},{"sectionNumber":"25/2009","sectionType":"part","heading":"25/2009","content":"## 25/2009","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"Yes. Amendment 1 replaces the original references (which cited FAA AD 2004-25-05 and an earlier issue of the Boeing service bulletin) with FAA AD 2007-01-15 and Boeing Alert Service Bulletin 747-54A2224 Rev 1, thereby changing the governing technical requirements and service-bulletin revision level (Background / Requirement)."},"complexity_factors":["Dependency on an external FAA airworthiness directive (FAA AD 2007-01-15) for the technical requirements (Requirement).","Incorporation of Boeing Alert Service Bulletin 747-54A2224 Rev 1 as the detailed maintenance instructions (Applicability / Requirement).","Applicability limited to specific 747 variants and only to aircraft equipped with nominated Pratt & Whitney or General Electric engines, requiring operators to verify applicability (Applicability, Note).","Compliance timing tied to intervals specified in the FAA AD and an explicit pre-certification deadline for aircraft not yet worked on, which creates scheduling urgency (Compliance).","Safety-critical consequence: the background notes fatigue fracture can cause loss of the strut upper link load path, raising the operational risk of non-compliance (Background).","Amendment history and version control: this is an amendment that replaces earlier referenced ADs and service bulletin issue levels, requiring tracking of document versions (Background / Requirement)."],"plain_english_summary":"This airworthiness directive requires operators of certain Boeing 747-100/‑200/‑300/747SP/747SR series aircraft with specified Pratt & Whitney or General Electric engines to carry out inspections and corrective actions set out in FAA AD 2007‑01‑15 and Boeing Alert Service Bulletin 747‑54A2224 Rev 1 to address fatigue cracking of the strut front spar chord assembly. Compliance must follow the intervals in the FAA AD and be completed before an Australian certificate of airworthiness is first issued if the work has not already been done."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is an amendment to an existing airworthiness directive. The original directive (referencing FAA AD 2004-25-05) has been updated to reference a newer FAA directive (2007-01-15) and a revised service bulletin (Rev 1). The scope remains unchanged — it addresses the same safety issue on the same aircraft models. This is a technical update rather than scope expansion."},"complexity_factors":["Short, single-purpose directive with one primary requirement","Heavy reliance on external documents (FAA AD 2007-01-15 and Boeing Alert Service Bulletin 747-54A2224 Rev 1) — the actual technical requirements are not reproduced in the text","Limited conditional logic: only two applicability conditions (aircraft model and engine type)","No defined terms section; minimal legislative cross-referencing","Straightforward compliance structure with clear timing requirements"],"plain_english_summary":"This airworthiness directive requires owners of certain Boeing 747-100/200/300, 747SP and 747SR aircraft with Pratt & Whitney or General Electric engines to inspect and, if needed, repair the strut front spar chord assembly that secures the engine to the wing. Prompted by metal fatigue and a reported fracture that could lead to engine separation, it enforces the inspections and actions in FAA AD 2007-01-15 (and the referenced Boeing service bulletin). First-time Australian registrants must complete the work before a certificate of airworthiness is issued."},"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-b747-322-amdt-1-strut-front-spar-chord-assembly","history":"/api/acts/ad-b747-322-amdt-1-strut-front-spar-chord-assembly/history","analysis":"/api/acts/ad-b747-322-amdt-1-strut-front-spar-chord-assembly/analysis","conflicts":"/api/acts/ad-b747-322-amdt-1-strut-front-spar-chord-assembly/conflicts","importantCases":"/api/acts/ad-b747-322-amdt-1-strut-front-spar-chord-assembly/important-cases","documents":"/api/acts/ad-b747-322-amdt-1-strut-front-spar-chord-assembly/documents"}}