{"id":"F2008L03421","name":"AD/B747/382 - Section 41 Fuselage Skins","slug":"ad-b747-382-section-41-fuselage-skins","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":120447,"registerId":"commonwealth-F2008L03421-current","compilationNumber":null,"startDate":"2026-04-03","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/B747/382 | Section 41 Fuselage Skins | 11/2008 DM |\n| ----------- | ------------------------- | ---------- |\n\n| Applicability: | Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP series airplanes, certificated in any category.                                                                                                                                             |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2008-17-17Amdt 39-15655.Note: Boeing Alert Service Bulletin 747-53A2704 refers.                                                                                                                                                                                 |\n| Compliance:    | As specified in the requirement document.                                                                                                                                                                                                                                                                                      |\n|                | This Airworthiness Directive becomes effective on 2 October 2008.                                                                                                                                                                                                                                                              |\n| Background:    | The FAA received reports of cracking found at fastener locations in the fuselage skins at section 41. This directive is issued to detect and correct fuselage skin cracks at fastener locations along the skin-to stringer attachments, which could join together and consequently result in rapid decompression of the cabin. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n1 September 2008","sortOrder":0},{"sectionNumber":"AD/B747/382","sectionType":"part","heading":"AD/B747/382","content":"## AD/B747/382","sortOrder":1},{"sectionNumber":"41","sectionType":"part","heading":"Fuselage Skins","content":"## Section 41 Fuselage Skins","sortOrder":2},{"sectionNumber":"11/2008 DM","sectionType":"part","heading":"11/2008 DM","content":"## 11/2008 DM","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument adopts the FAA AD requirements for the listed 747 models and does not, in the supplied text, expand or narrow applicability or alter the substantive requirements. No textual indication of a change in scope from the referenced FAA directive appears in this document (see Requirement; Applicability)."},"complexity_factors":["External normative reference: the directive requires action “in accordance with the technical requirements of FAA AD 2008-17-17Amdt 39-15655” (Requirement) — operators must obtain and follow another authority's document.","Broad model applicability: covers many 747 variants (Applicability) — fleets must be reviewed to determine applicability per aircraft.","Safety-critical work: inspections and repairs on fuselage skins at fastener locations (Background) — work will require certified maintenance and possible structural repair engineering.","Compliance specifics delegated: compliance timing and methods are “as specified in the requirement document” (Compliance) — limited local discretion and reliance on FAA/service bulletin detail.","Operational impact: effective date is 2 October 2008 (Compliance) — operators face scheduling, downtime and cost consequences to meet the timetable."],"plain_english_summary":"This Airworthiness Directive requires operators of the listed Boeing 747 variants to carry out inspections and corrective actions set out in FAA AD 2008-17-17 (and the referenced Boeing service bulletin) to find and repair cracks at fastener locations in fuselage Section 41. Undetected cracking could join and cause rapid cabin decompression; the AD sets mandatory inspection and repair obligations, a compliance timetable (effective 2 October 2008), and therefore creates maintenance costs and scheduling obligations for operators."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific structural defect in a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (under 300 words)","Only 1 defined term implicitly used ('Section 41' — a standard Boeing structural designation)","No conditional logic or nested exceptions — simple mandatory compliance structure","Single cross-reference to external FAA document (AD 2008-17-17) and Boeing service bulletin","No internal definitions section or interpretation provisions","Straightforward applicability table with model numbers"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections and repairs for cracks at rivet/fastener sites in Section 41 of specified Boeing 747 series (‑100/‑200/‑300/‑400/‑SR/‑SP) to prevent crack propagation and possible rapid decompression. It requires following FAA AD 2008‑17‑17 and Boeing Alert Service Bulletin 747‑53A2704; it became effective 2 October 2008."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-382-section-41-fuselage-skins","history":"/api/acts/ad-b747-382-section-41-fuselage-skins/history","analysis":"/api/acts/ad-b747-382-section-41-fuselage-skins/analysis","conflicts":"/api/acts/ad-b747-382-section-41-fuselage-skins/conflicts","importantCases":"/api/acts/ad-b747-382-section-41-fuselage-skins/important-cases","documents":"/api/acts/ad-b747-382-section-41-fuselage-skins/documents"}}