{"id":"F2008L02361","name":"AD/B747/380 - External Skin Doublers","slug":"ad-b747-380-external-skin-doublers","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":139474,"registerId":"commonwealth-F2008L02361-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 747 Series Aeroplanes","sectionType":"division","heading":"Boeing 747 Series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/B747/380 | External Skin Doublers | 8/2008 |\n| ----------- | ---------------------- | ------ |\n\n| Applicability: | Model 747-100, -100B, -200B, -200C, -200F, -300, 747SR, and 747SP series aircraft.                                                                                                                                          |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2008-10-15 Amdt 39-15522.Note: Boeing Alert Service Bulletin 747-53A2748 original issue, or later FAA approved revision, refers.                             |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of31 July 2008.                                                                                                                                     |\n|                | This Airworthiness Directive becomes effective on 31 July 2008.                                                                                                                                                             |\n| Background:    | The FAA received a report of cracked fastener holes at the right S-6 lap splice between STA 340 and STA 380. Undetected cracking in the fuselage skin could result in rapid decompression and loss of structural integrity. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n12 June 2008","sortOrder":0},{"sectionNumber":"AD/B747/380","sectionType":"part","heading":"AD/B747/380","content":"## AD/B747/380","sortOrder":1},{"sectionNumber":"External Skin Doublers","sectionType":"part","heading":"External Skin Doublers","content":"## External Skin Doublers","sortOrder":2},{"sectionNumber":"8/2008","sectionType":"part","heading":"8/2008","content":"## 8/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1979},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument appears to represent the original scope of the directive, narrowly focused on addressing a specific structural airworthiness safety issue (fuselage skin cracking at the S-6 lap splice) for the listed Boeing 747 variants. There is no indication of expansion beyond the immediate safety defect."},"complexity_factors":["Legislative instrument incorporates external technical documents by reference (FAA AD and Boeing Service Bulletin) rather than setting out requirements directly","Use of specialized aviation engineering terminology (e.g., 'S-6 lap splice', 'STA 340', 'skin doublers', 'Alert Service Bulletin')","Multiple aircraft model variants specified with precise applicability criteria","Dependence on US regulatory standards and manufacturer technical data for substantive compliance requirements"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and repair of the S-6 lap splice fuselage skin on specified older Boeing 747 models to address cracking around fastener holes. It targets operators of 747-100/100B, 747-200 variants, 747-300, 747SR and 747SP in Australia.\n\nThe work must follow FAA AD 2008-10-15 and Boeing Alert Service Bulletin 747-53A2748 to prevent rapid decompression and possible structural failure; compliance was required by 31 July 2008."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-380-external-skin-doublers","history":"/api/acts/ad-b747-380-external-skin-doublers/history","analysis":"/api/acts/ad-b747-380-external-skin-doublers/analysis","conflicts":"/api/acts/ad-b747-380-external-skin-doublers/conflicts","importantCases":"/api/acts/ad-b747-380-external-skin-doublers/important-cases","documents":"/api/acts/ad-b747-380-external-skin-doublers/documents"}}