{"id":"F2009L00085","name":"AD/B747/342 Amdt 1 - Main Entry Door No. 3 Fuselage Cutout","slug":"ad-b747-342-amdt-1-main-entry-door-no-3-fuselage-cutout","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76498,"registerId":"commonwealth-F2009L00085-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/B747/342 Amdt 1 | Main Entry Door No. 3 Fuselage Cutout | 2/2009 |\n| ------------------ | ------------------------------------- | ------ |\n\n| Applicability: | Model 747-100, -100B, -100B SUD, -200B, -200C, -300, -400, -400D, and 747SR series aircraft.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2006-06-10 Amdt 39-14519.Note: Boeing Alert Service Bulletin 747-53A2512 Revision 1, or later FAA approved revision, refers.Corrective actions (repairs or repeat inspections) that are approved on an FAA form 8100-9 and approved by the Manager, Seattle Aircraft Certification Office or delegate as an Alternative Method of Compliance (AMOC) to the requirements of FAA AD 2006-06-10, may be carried out without the need to obtain an exclusion from CASA from this airworthiness directive.                                                                                        |\n| Compliance:    | As specified in the Requirement document.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n|                | This Amendment becomes effective on 12 February 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n| Background:    | The FAA received reports of cracks in the skin and bearstrap at the upper aft corner and at the lower forward corner of the fuselage cutout at main entry door 3. Undetected cracking could propagate and result in rapid decompression of the aircraft.This amendment allows the use of an FAA approved Alternative Method of Compliance (AMOC) to the requirements of this AD, without the need for the operator to continually apply for an exclusion for repairs and/or repeat inspections that are already approved on a form 8100-9 as an AMOC by an FAA delegate.The original issue of this Airworthiness Directive became effective on 8 June 2006. |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n11 December 2008","sortOrder":0},{"sectionNumber":"AD/B747/342 Amdt 1","sectionType":"part","heading":"AD/B747/342 Amdt 1","content":"## AD/B747/342 Amdt 1","sortOrder":1},{"sectionNumber":"Main Entry Door No. 3 Fuselage Cutout","sectionType":"part","heading":"Main Entry Door No. 3 Fuselage Cutout","content":"## Main Entry Door No. 3 Fuselage Cutout","sortOrder":2},{"sectionNumber":"2/2009","sectionType":"part","heading":"2/2009","content":"## 2/2009","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":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the Airworthiness Directive. The change is purely procedural — streamlining the approval process for alternative compliance methods. It does not expand the aircraft models covered, the physical areas requiring inspection, or the nature of the safety defect being addressed. The original intent was to prevent structural failure around Door No. 3; this amendment simply removes a redundant administrative step for operators using FAA-approved alternative repairs."},"complexity_factors":["Short, single-purpose instrument (approximately 250 words of substantive content)","Only 2 defined concepts requiring explanation (AMOC and bearstrap — the latter is explained contextually)","Single cross-reference to FAA AD 2006-06-10 and Boeing Service Bulletin 747-53A2512","Simple conditional logic: if repair approved on FAA Form 8100-9, then no CASA exclusion needed","No nested exceptions or layered definitions","Clear, tabular format with distinct Applicability/Requirement/Compliance/Background sections","Technical aviation terminology assumed (fuselage cutout, bearstrap, decompression) but context makes meaning clear"],"plain_english_summary":"This Airworthiness Directive mandates inspections and repairs for cracking around Door No. 3 on certain Boeing 747 models (‑100/‑200/‑300/‑400/747SR) to prevent crack growth and possible rapid decompression. It requires operators to follow FAA AD 2006‑06‑10, inspect the door frame and bearstrap, and repair or repeat inspections as needed.\n\nAmendment 1 lets operators use FAA‑approved alternative methods of compliance (on FAA Form 8100‑9) without separately seeking CASA approval, reducing paperwork while keeping safety."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment does not change the AD’s technical safety obligations (operators still must follow FAA AD 2006-06-10) but changes administrative scope: it permits FAA‑approved AMOCs documented on FAA form 8100‑9 to be used without CASA exclusion, reducing repeated CASA approval steps and shifting practical approval authority toward FAA delegates (Requirement; Background)."},"complexity_factors":["Cross-reference to external instrument: compliance is by following FAA AD 2006-06-10 rather than restating technical inspection/repair steps (Requirement).","AMOC approval mechanism: allows use of FAA‑approved AMOCs on FAA form 8100‑9, shifting approval reliance to FAA delegates or the Manager, Seattle Aircraft Certification Office (Requirement; Background).","Administrative change vs technical mandate: the AD keeps FAA technical requirements mandatory but removes need for repeated CASA exclusions for FAA‑approved AMOCs, altering compliance workflow (Requirement).","Applicability breadth: applies to multiple 747 variants (Applicability), so fleet operators with mixed types face coordination and record-keeping complexity.","Safety urgency with limited procedural detail: cites risk of rapid decompression from undetected cracking (Background) but delegates inspection/repair specifics to the FAA service bulletin/AD, requiring operators to consult external documents.","Who bears costs: operators must carry out inspections/repairs and implement AMOCs; regulators decide on AMOC acceptance (Requirement; Background)."],"plain_english_summary":"This amendment requires operators of the listed Boeing 747 models to follow FAA AD 2006-06-10’s technical instructions to inspect and fix cracking around the fuselage cutout at main entry door 3. It permits operators to rely on FAA‑approved Alternative Methods of Compliance (AMOCs) documented on FAA form 8100‑9 without repeatedly applying to CASA for an exclusion. Effective 12 February 2009, the change responds to reports that undetected cracking could lead to rapid decompression."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-342-amdt-1-main-entry-door-no-3-fuselage-cutout","history":"/api/acts/ad-b747-342-amdt-1-main-entry-door-no-3-fuselage-cutout/history","analysis":"/api/acts/ad-b747-342-amdt-1-main-entry-door-no-3-fuselage-cutout/analysis","conflicts":"/api/acts/ad-b747-342-amdt-1-main-entry-door-no-3-fuselage-cutout/conflicts","importantCases":"/api/acts/ad-b747-342-amdt-1-main-entry-door-no-3-fuselage-cutout/important-cases","documents":"/api/acts/ad-b747-342-amdt-1-main-entry-door-no-3-fuselage-cutout/documents"}}