{"id":"F2006B02712","name":"AD/B727/188 - Main Deck Cargo Door Forward and Aft Hinge Fitting Structure","slug":"ad-b727-188-main-deck-cargo-door-forward-and-aft-hinge-fitting-structure","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42028,"registerId":"commonwealth-F2006B02712-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/188 - Main Deck Cargo Door Forward and Aft Hinge Fitting Structure","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n\nAIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)  \n\nBoeing 727 Series Aeroplanes\n\nAD/B727/188 Main Deck Cargo Door Forward and Aft Hinge\n\nFitting Structure\n\n  \n5/2004\n\nApplicability: Model 727, 727-100C, 727-200F, and 727C series aircraft, as listed in Boeing Alert Service Bulletin 727-53A0226, dated 11 September 2003.\n\nRequirement: Action in accordance with the technical requirements of FAA AD 2004-03-31 Amdt 39-13475.\n\nIf any crack is found: Repair it before further flight in accordance with a method approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA; or per data meeting the type certification basis of the aircraft approved by a Boeing Company Designated Engineering Representative (DER) who has been authorised by the Manager, Seattle ACO, to make such findings.\n\nCompliance: As specified in the Requirement document, with a revised effective date of 13 May 2004.\n\nThis Airworthiness Directive becomes effective on 13 May 2004.\n\nBackground: The FAA requires inspections for cracks in the fuselage skin, strap (bearstrap), and doubler at the forward and aft hinge fittings for the main deck cargo door. Such cracking could reach critical crack length and result in rapid decompression of the aircraft.\n\n![Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 2 April 2004\n\n![](image.001.png)\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 21 April 2004.\n\n  \n\nPage 1 of 1","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"This AD adopts the FAA's technical requirements for inspection and repair of main-deck cargo door hinge fittings for the listed Boeing 727 models and sets an Australian effective date (13 May 2004). It does not broaden the affected aircraft or require actions beyond the FAA AD and the referenced Boeing service bulletin; it primarily imposes the same inspections/repair approvals on Australian operators."},"complexity_factors":["Cross-reference to FAA AD 2004-03-31 as the mandatory technical requirement (requires operators to follow an external instrument).","Applicability tied to models listed in Boeing Alert Service Bulletin 727-53A0226 (requires checking external service bulletin to determine affected airframes).","Repairs must be approved by the Manager, Seattle Aircraft Certification Office (FAA) or a Boeing DER authorised by that Manager (creates multi-jurisdictional approval pathway and administrative burden).","Immediate operational constraint: detected cracks must be repaired before further flight (creates potential aircraft downtime and logistics costs).","Inspections target multiple structural elements (fuselage skin, bearstrap, doubler at forward and aft hinge fittings) requiring technical access and specialised inspection techniques.","Compliance timing is governed by the referenced FAA document with a revised effective date, so operators must reconcile CASA publication timing with FAA compliance schedules."],"plain_english_summary":"This Airworthiness Directive requires operators of specified Boeing 727 series aircraft to inspect the main-deck cargo door forward and aft hinge fitting areas for cracks and to repair any crack before further flight, following the technical requirements of FAA AD 2004-03-31 and Boeing Alert Service Bulletin 727-53A0226. It takes effect 13 May 2004. Operators pay for inspections and repairs; repair methods must be approved by the FAA Seattle ACO Manager or an authorised Boeing DER. The measure targets cracking that could lead to rapid decompression."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with a narrow, specific safety purpose. It addresses exactly what it says it does: inspecting and repairing cargo door hinge fittings on specific Boeing 727 variants. No scope creep is evident."},"complexity_factors":["Very short document (1 page)","Only 4 defined aircraft models in applicability section","Single requirement with straightforward conditional (if crack found → repair before flight)","No nested exceptions or complex cross-referencing — references only one external FAA directive","Clear, linear structure: Applicability → Requirement → Compliance → Background"],"plain_english_summary":"Safety order for certain Boeing 727 cargo aircraft requiring inspection of main deck cargo door hinge fittings for cracks in the surrounding fuselage skin. Applies to 727, 727-100C, 727-200F and 727C series per Boeing’s September 2003 service bulletin. Any cracked hinge grounds the airplane until an FAA- or FAA‑authorized Boeing-approved repair is done. Adopted to prevent rapid decompression. Effective 13 May 2004."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-188-main-deck-cargo-door-forward-and-aft-hinge-fitting-structure","history":"/api/acts/ad-b727-188-main-deck-cargo-door-forward-and-aft-hinge-fitting-structure/history","analysis":"/api/acts/ad-b727-188-main-deck-cargo-door-forward-and-aft-hinge-fitting-structure/analysis","conflicts":"/api/acts/ad-b727-188-main-deck-cargo-door-forward-and-aft-hinge-fitting-structure/conflicts","importantCases":"/api/acts/ad-b727-188-main-deck-cargo-door-forward-and-aft-hinge-fitting-structure/important-cases","documents":"/api/acts/ad-b727-188-main-deck-cargo-door-forward-and-aft-hinge-fitting-structure/documents"}}