{"id":"F2007L02683","name":"AD/B747/360 - Fuselage Skin at Stringer 5 between BS 340 and 350","slug":"ad-b747-360-fuselage-skin-at-stringer-5-between-bs-340-and-350","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":68573,"registerId":"commonwealth-F2007L02683-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/B747/360 | Fuselage Skin at Stringer 5between BS 340 and 350 | 10/2007 |\n| ----------- | ------------------------------------------------- | ------- |\n\n| Applicability: | Model 747-100, -100B, -200B, -200C, -200F, -300, 747SR, and 747SP series aircraft; as identified in Boeing Alert Service Bulletin 747-53A2542 original issue, or later FAA approved revision.                              |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2007-15-07Amdt 39-15136.                                                                                                                                    |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of27 September 2007.                                                                                                                               |\n|                | This Airworthiness Directive becomes effective on 27 September 2007.                                                                                                                                                       |\n| Background:    | The FAA received reports of fatigue cracks in the fuselage skin near stringer 5 between stations 340 and 350. Undetected cracks in this area could join together and result in in-flight depressurisation of the aircraft. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n14 August 2007","sortOrder":0},{"sectionNumber":"AD/B747/360","sectionType":"part","heading":"AD/B747/360","content":"## AD/B747/360","sortOrder":1},{"sectionNumber":"Fuselage Skin at Stringer 5between BS 34","sectionType":"part","heading":"Fuselage Skin at Stringer 5between BS 340 and 350","content":"## Fuselage Skin at Stringer 5  \nbetween BS 340 and 350","sortOrder":2},{"sectionNumber":"10/2007","sectionType":"part","heading":"10/2007","content":"## 10/2007","sortOrder":3}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive targeting a specific structural fatigue issue on specific aircraft models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 1 defined term implicitly referenced (the FAA AD number)","Single cross-reference to external technical document (FAA AD 2007-15-07)","No conditional logic or nested exceptions — straightforward applicability and requirement","Clear, unambiguous applicability table identifying specific aircraft models","Minimal legislative machinery — essentially a notice adopting external technical standards"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and repair of the fuselage skin near stringer 5 between body stations 340–350 on certain older Boeing 747 models (including 747‑100/200/300, 747SR, 747SP). It adopts FAA AD 2007‑15‑07 after fatigue cracks were found that could link and cause sudden loss of cabin pressure. Operators must comply with the FAA instructions; the AD is effective 27 September 2007."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive implements the FAA AD requirements for the same fuselage area and listed 747 models and only revises the effective date to 27 September 2007; it does not expand or narrow the technical scope set out by the referenced FAA AD and Boeing bulletin."},"complexity_factors":["References an external FAA Airworthiness Directive (FAA AD 2007-15-07Amdt 39-15136) and a Boeing Alert Service Bulletin, creating dependency on outside documents for technical detail.","Applies to multiple Boeing 747 model variants, requiring operators to determine applicability to individual airframes.","Safety‑critical inspection and repair tasks that impose operational disruption and potential costs on operators (planning, downtime, parts, labour).","Revised effective date requires affected operators to adjust compliance scheduling; limited regulatory discretion in technical requirements since they mirror the FAA AD.","Clear, narrow technical focus reduces legal drafting complexity but increases practical complexity for maintenance execution and tracking compliance."],"plain_english_summary":"**What it does:** Requires operators of specified Boeing 747 series aircraft to carry out inspections and any required repairs to the fuselage skin at stringer 5 between fuselage stations 340 and 350, by following the technical requirements of FAA AD 2007-15-07Amdt 39-15136 and the referenced Boeing Alert Service Bulletin. The directive takes effect on 27 September 2007.\n\nWho pays and why it matters: Aircraft operators must fund and schedule the inspections/repairs to find fatigue cracks that could otherwise join and cause in‑flight depressurisation; failure to comply risks regulatory action or grounding."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-360-fuselage-skin-at-stringer-5-between-bs-340-and-350","history":"/api/acts/ad-b747-360-fuselage-skin-at-stringer-5-between-bs-340-and-350/history","analysis":"/api/acts/ad-b747-360-fuselage-skin-at-stringer-5-between-bs-340-and-350/analysis","conflicts":"/api/acts/ad-b747-360-fuselage-skin-at-stringer-5-between-bs-340-and-350/conflicts","importantCases":"/api/acts/ad-b747-360-fuselage-skin-at-stringer-5-between-bs-340-and-350/important-cases","documents":"/api/acts/ad-b747-360-fuselage-skin-at-stringer-5-between-bs-340-and-350/documents"}}