{"id":"F2007L04217","name":"AD/B737/242 Amdt 2 - Fuselage Skin, Doubler, Strap, and Frames Surrounding Cargo Doors","slug":"ad-b737-242-amdt-2-fuselage-skin-doubler-strap-and-frames-surrounding-cargo-doors","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":70416,"registerId":"commonwealth-F2007L04217-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 737 Series Aeroplanes","sectionType":"division","heading":"Boeing 737 Series Aeroplanes","content":"### Boeing 737 Series Aeroplanes\n\n| AD/B737/242 Amdt 2 | Fuselage Skin, Doubler, Strap, andFrames Surrounding Cargo Doors | 12/2007 |\n| ------------------ | ---------------------------------------------------------------- | ------- |\n\n| Applicability: | All Model 737-100, -200, -200C, -300, -400, and -500 series aircraft.                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2005-07-19Amdt 39-14044.An FAA 8100-9 form that specifies the affected aircraft and the associated repeat inspection time is an acceptable means of compliance with paragraph (g) of FAA AD 2005-07-19.Note 1: Boeing Alert Service Bulletin 737-53A1228, or a later FAA approved revision, refers.Note 2: Accomplishment of the requirements of paragraph (f) of the Requirement document terminates the requirements of AD/B737/10 Amdt 2 (FAA AD 93-14-10). |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of6 June 2005.The compliance time remains unchanged by this issue of the Directive.                                                                                                                                                                                                                                                                                                                                                                   |\n|                | This Amendment becomes effective on 22 November 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n| Background:    | The FAA received reports of multiple fatigue cracks in the fuselage skin and bonded skin doubler, bearstrap, and doorway frames surrounding the forward and aft cargo doors. Such cracking, if undetected, could result in reduced structural integrity of the frames, possible loss of a cargo door, and consequent rapid decompression of the fuselage.Amendment 1 introduced Requirement Note 2.                                                                                                                           |\n\n|     | Amendment 2 is issued to allow an Alternative Method of Compliance to paragraph (g) of FAA AD 2005-07-19. |\n| --- | --------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n9 October 2007","sortOrder":0},{"sectionNumber":"AD/B737/242 Amdt 2","sectionType":"part","heading":"AD/B737/242 Amdt 2","content":"## AD/B737/242 Amdt 2","sortOrder":1},{"sectionNumber":"Fuselage Skin, Doubler, Strap, andFrames","sectionType":"part","heading":"Fuselage Skin, Doubler, Strap, andFrames Surrounding Cargo Doors","content":"## Fuselage Skin, Doubler, Strap, and  \nFrames Surrounding Cargo Doors","sortOrder":2},{"sectionNumber":"12/2007","sectionType":"part","heading":"12/2007","content":"## 12/2007","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendment 2 does not broaden the fleet applicability or alter inspection intervals; it adds an Alternative Method of Compliance to paragraph (g) by accepting FAA Form 8100-9, thereby changing the available compliance mechanisms rather than the substantive inspection requirements (Amendment 2; Requirement; Compliance)."},"complexity_factors":["Cross-reference to FAA AD 2005-07-19Amdt 39-14044 as the substantive requirement — compliance depends on an external instrument (Requirement).","Acceptance of FAA Form 8100-9 as an alternative means of compliance for paragraph (g) creates a paperwork/administrative compliance pathway (Requirement).","Reference to Boeing Alert Service Bulletin 737-53A1228 or later FAA‑approved revisions links technical method to a manufacturer service bulletin (Note 1).","Interaction with prior directives: performing paragraph (f) work terminates AD/B737/10 Amdt 2 (FAA AD 93-14-10), requiring operators to track termination effects across ADs (Note 2).","Applicability covers a broad fleet (all 737-100 through -500), concentrating compliance burden on many operators (Applicability).","Compliance timing is retained from the Requirement document but effective dates are adjusted, which requires careful attention to dates (Compliance).","Safety-critical inspections for fatigue cracking raise operational and repair cost implications and require technical competence to detect and fix (Background)."],"plain_english_summary":"This amendment requires operators of Boeing 737‑100 through ‑500 series aeroplanes to carry out the inspections and corrective actions set out in FAA AD 2005‑07‑19 (as amended). It formally accepts FAA Form 8100‑9 as an alternative way to identify affected aircraft and record repeat inspection timing. The measure responds to reported fatigue cracking in the fuselage skin, doublers, bearstraps and frames around forward and aft cargo doors that could lead to frame failure, loss of a cargo door and rapid decompression; operators must comply by the existing deadlines."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: addressing fatigue cracks in Boeing 737 Classic series cargo door surrounds. Amendment 2 is purely procedural — it adds flexibility for how operators demonstrate compliance with paragraph (g) of the referenced FAA directive. It does not expand the aircraft types covered, the physical areas requiring inspection, or the safety objectives. The scope has remained consistent since the original AD was issued."},"complexity_factors":["Heavy reliance on external documents: the directive incorporates by reference FAA AD 2005-07-19 and Boeing Alert Service Bulletin 737-53A1228 without reproducing their full text","Nested compliance structure: Amendment 2 modifies Amendment 1, which itself modified the original directive, creating a chain of references","Cross-referenced termination clause: Note 2 references the termination of requirements from a separate directive (AD/B737/10 Amdt 2)","Technical aviation terminology throughout (fuselage skin, doubler, bearstrap, doorway frames) requiring domain knowledge","Dual regulatory framework: Australian directive implements US FAA requirements, requiring operators to track both CASA and FAA documentation","Conditional compliance mechanism: the Alternative Method of Compliance (AMOC) provision in paragraph (g) creates an exception pathway with its own documentation requirements"],"plain_english_summary":"This Airworthiness Directive mandates inspections and repairs of fuselage structure around the forward and aft cargo doors on Boeing 737-100 to -500 series aircraft to detect fatigue cracking that could cause door failure and rapid decompression. The Amendment 2 change lets operators use FAA Form 8100-9 as acceptable proof of compliance, giving Australian operators an alternative way to show they meet the existing inspection requirements."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-242-amdt-2-fuselage-skin-doubler-strap-and-frames-surrounding-cargo-doors","history":"/api/acts/ad-b737-242-amdt-2-fuselage-skin-doubler-strap-and-frames-surrounding-cargo-doors/history","analysis":"/api/acts/ad-b737-242-amdt-2-fuselage-skin-doubler-strap-and-frames-surrounding-cargo-doors/analysis","conflicts":"/api/acts/ad-b737-242-amdt-2-fuselage-skin-doubler-strap-and-frames-surrounding-cargo-doors/conflicts","importantCases":"/api/acts/ad-b737-242-amdt-2-fuselage-skin-doubler-strap-and-frames-surrounding-cargo-doors/important-cases","documents":"/api/acts/ad-b737-242-amdt-2-fuselage-skin-doubler-strap-and-frames-surrounding-cargo-doors/documents"}}