{"id":"F2008L00597","name":"AD/B747/345 Amdt 1 - Body Station 1480 Longeron Extension Fittings","slug":"ad-b747-345-amdt-1-body-station-1480-longeron-extension-fittings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119568,"registerId":"commonwealth-F2008L00597-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/B747/345 Amdt 1 | Body Station 1480 Longeron Extension Fittings | 3/2008 |\n| ------------------ | --------------------------------------------- | ------ |\n\n| Applicability: | Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F, 747SR, and 747SP series aircraft; as listed in Boeing Alert Service Bulletin747-53A2515 Revision 1, or later FAA approved revision.                                                                                                                                                                                                                                                                                                                             |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2007-26-17 Amdt 39-15319.                                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n| Compliance:    | As specified in the Requirement document.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n|                | This Amendment becomes effective on 13 March 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n| Background:    | The FAA received reports of cracking in the longeron extension fittings at body station 1480 due to accidental damage during production. Undetected cracking in the longeron extension fittings could result in rapid decompression of the aircraft, and possible in-flight breakup of the fuselage.Amendment 1 is issued in response to a new FAA AD, which adds aircraft to applicability as a result of reports that accidental drilling damage to the longeron extension fittings was found on aircraft not subject to the existing FAA AD. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n30 January 2008","sortOrder":0},{"sectionNumber":"AD/B747/345 Amdt 1","sectionType":"part","heading":"AD/B747/345 Amdt 1","content":"## AD/B747/345 Amdt 1","sortOrder":1},{"sectionNumber":"Body Station 1480 Longeron Extension Fit","sectionType":"part","heading":"Body Station 1480 Longeron Extension Fittings","content":"## Body Station 1480 Longeron Extension Fittings","sortOrder":2},{"sectionNumber":"3/2008","sectionType":"part","heading":"3/2008","content":"## 3/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 expands the AD’s scope by adding aircraft to the applicability list after reports that accidental drilling damage to the longeron extension fittings was found on aircraft not covered by the existing AD. The instrument therefore increases the set of operators required to follow FAA AD 2007-26-17’s inspection and repair requirements."},"complexity_factors":["Direct incorporation of an external instrument (FAA AD 2007-26-17) — requires cross-referencing another legal/technical document.","Applicability spans many 747 variants, requiring operator-specific applicability checks against Boeing service bulletin lists.","Technical inspection and corrective-action requirements may be detailed and technical, placing a compliance burden on maintenance organisations.","Amendment expands scope by adding aircraft previously not covered, creating potential retrospective inspection obligations.","Compliance timing and record-keeping obligations derive from the referenced FAA AD rather than this short amendment, increasing administrative steps to confirm obligations."],"plain_english_summary":"**What this does:** This amendment requires operators of the listed Boeing 747 variants to carry out the inspections and corrective actions set out in FAA AD 2007-26-17, as adopted by the Civil Aviation Safety Authority. It mechanically adopts the FAA AD’s technical requirements and adds more aircraft into the AD’s scope.\n\nWho is affected and why it matters: Owners, operators and maintenance organisations of the specified 747 models must inspect and repair longeron extension fittings at body station 1480 to detect accidental-drill cracking that could cause rapid decompression or fuselage failure."},"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":true,"description":"The original directive covered a subset of 747 aircraft with a specific manufacturing defect. Amendment 1 expands the scope to include additional aircraft models after discovering the accidental drilling damage was more widespread than initially identified. The core purpose (fixing cracked longeron fittings) remains the same, but the reach has broadened."},"complexity_factors":["Very short document (under 300 words)","Only 1 substantive requirement: comply with external FAA document","No defined terms section — relies entirely on external technical references","No conditional logic or nested exceptions","Single cross-reference to FAA AD 2007-26-17 and Boeing Service Bulletin 747-53A2515","Straightforward applicability table with aircraft models listed explicitly"],"plain_english_summary":"This AD orders owners/operators of multiple Boeing 747 variants (including -100/200/300/400, 747SR, 747SP) to inspect and repair a manufacturing-induced defect at body station 1480 where incorrectly drilled holes have led to cracked longeron extension fittings. Left uncorrected, the damage risks rapid decompression and possible structural failure. This amendment expands the original directive to cover additional aircraft discovered to have the same manufacturing damage."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-345-amdt-1-body-station-1480-longeron-extension-fittings","history":"/api/acts/ad-b747-345-amdt-1-body-station-1480-longeron-extension-fittings/history","analysis":"/api/acts/ad-b747-345-amdt-1-body-station-1480-longeron-extension-fittings/analysis","conflicts":"/api/acts/ad-b747-345-amdt-1-body-station-1480-longeron-extension-fittings/conflicts","importantCases":"/api/acts/ad-b747-345-amdt-1-body-station-1480-longeron-extension-fittings/important-cases","documents":"/api/acts/ad-b747-345-amdt-1-body-station-1480-longeron-extension-fittings/documents"}}