{"id":"F2006B02701","name":"AD/B727/177 - Main Deck Cargo Door Hinge, Cargo Door System and Cargo Barrier - 1","slug":"ad-b727-177-main-deck-cargo-door-hinge-cargo-door-system-and-cargo-barrier-1","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42017,"registerId":"commonwealth-F2006B02701-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/177 - Main Deck Cargo Door Hinge, Cargo Door System and Cargo Barrier - 1","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation 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\n![](image.001.png)  \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 CAR 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\nBoeing 727 Series Aeroplanes\n\nAD/B727/177 Main Deck Cargo Door Hinge, Cargo Door System\n\nand Cargo Barrier - 1\n\n  \n11/2002\n\nApplicability: Model 727 series aircraft that have been converted from a passenger to a cargo- carrying (“freighter”) configuration in accordance with Supplemental Type Certificate (STC) SA1767SO or SA1768SO.\n\nRequirement: Action in accordance with the technical requirements of FAA AD 2002-16-19 Amdt 39-12858\n\nNote: Accomplishment of the actions in accordance with Federal Express E.O. Revision Record 7-5230-7-5000, Revision B, release date 18 December 2001, constitutes compliance with the requirements of paragraphs (b) and (c) of the Requirement document.\n\nCompliance: As specified in the Requirement document with a revised effective date of 31 October 2002.\n\nThis Airworthiness Directive becomes effective on 31 October 2002.\n\nBackground: The FAA has determined that the main deck cargo door hinge installed on conversion from a passenger carrying to a cargo carrying aircraft configuration, is not fail- safe; that certain main deck cargo door control systems do not provide an adequate leve l of safety; and that the main deck cargo barrier is not structurally adequate during an emergency landing.\n\n![Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.](image.002.jpeg)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 11 September 2002\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 9 October 2002.\n\n  \nPage 1 of 1","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope. It targets a specific safety issue on a specific aircraft type with specific modification history. There is no evidence of scope creep — the document does exactly what its title suggests and addresses the three stated safety deficiencies without expanding into broader operational or maintenance requirements."},"complexity_factors":["Short, single-page document with clear structure","Only 2 defined technical terms (STC references) with full names provided in parentheses","Single cross-reference to external FAA document (AD 2002-16-19) rather than internal legislative complexity","Simple conditional logic: applies only to specific aircraft models with specific conversion certificates","Clear compliance pathway with alternative method explicitly stated in Note","No nested exceptions or recursive definitions"],"plain_english_summary":"This CASA Airworthiness Directive makes mandatory safety modifications and inspections on Boeing 727 freighters converted from passenger aircraft under STCs SA1767SO or SA1768SO. It addresses non-fail-safe main-deck cargo door hinges, inadequate door control systems, and insufficient cargo barriers, and requires compliance with FAA AD 2002-16-19 (with an alternate FedEx engineering order). Effective 31 October 2002, it prevents catastrophic decompression, loss of control, and crew injury."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD imports and enforces the corrective actions set out in FAA AD 2002-16-19 for a narrowly defined group of converted Boeing 727 freighters. It does not broaden the class of affected aircraft or add additional substantive requirements beyond those in the FAA AD, other than specifying that compliance with the listed FedEx Engineering Order satisfies certain paragraphs. Therefore the scope has not grown beyond the instrument's original safety‑correction purpose; it remains focused on correcting the identified unsafe condition for the specified converted aircraft."},"complexity_factors":["Short one-page AD (single page).","Narrow applicability: only Boeing 727s converted under STC SA1767SO or SA1768SO.","Single external cross-reference: requires compliance with FAA AD 2002-16-19 (primary substantive text located outside this instrument).","One additional cross-reference to Federal Express E.O. Revision B as an approved compliance method for some paragraphs.","No defined terms, no nested exceptions, no multiple parts or schedules within the instrument.","Compliance timing delegated to the FAA AD (revised effective date specified)."],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- It orders operators of certain Boeing 727 aeroplanes that have been converted from passenger to cargo (freighter) configuration under Supplemental Type Certificate (STC) SA1767SO or SA1768SO to carry out the specific inspection, modification or repair actions set out in the United States FAA Airworthiness Directive (FAA AD) 2002-16-19 (Amendment 39-12858).\n- Compliance must be carried out in the manner and at the times specified in that FAA AD, with a revised effective date of 31 October 2002.\n- The AD explicitly states that completing the actions described in Federal Express Engineering Order (E.O.) Revision Record 7-5230-7-5000, Revision B (release date 18 December 2001) satisfies the requirements of certain paragraphs of the FAA AD.\n\n**Who is affected**\n\n- Owners and operators of Boeing 727 series aircraft that have been converted to freighters under STC SA1767SO or SA1768SO. This is a specific subset of 727s — passenger-configured 727s that were not converted under those STCs are not covered.\n- Maintenance organisations, engineers and technicians who perform inspections, modifications and repairs on those converted aircraft.\n\n**Why it matters (stated purpose and practical effect)**\n\n- The stated safety concern (the FAA’s finding, repeated in the AD background) is that: the main deck cargo door hinge fitted during those conversions may not be fail‑safe; some cargo door control systems may not provide an adequate level of safety; and the main deck cargo barrier may not be structurally adequate in an emergency landing.\n- Mechanically, the AD forces affected operators to inspect/modify/repair or replace the cargo door hinge, the cargo door control system and the cargo barrier as required by the FAA AD. The intended outcome is to correct the unsafe condition by changing aircraft hardware/procedures.\n\n**Who pays, who decides, and how behaviour changes**\n\n- Aircraft owners/operators pay for the inspections, parts, labour and any aircraft downtime required to comply.\n- The Civil Aviation Safety Authority (CASA), via its delegate, imposes the AD under the Civil Aviation Regulations power to mandate corrective action for unsafe conditions. The AD delegates operational detail to the FAA AD document and to the specified FedEx E.O. as an approved compliance method.\n- Operators must schedule and carry out the mandated work; failure to comply would leave the aircraft non‑compliant with its Australian airworthiness requirements and could lead to grounding or enforcement action.\n\n**Implementation, compliance burden and trade‑offs**\n\n- Compliance cost components: parts (hinge, barrier hardware or control components), skilled maintenance labour, engineering/approval time, and lost revenue while the aircraft is out of service.\n- Implementation risk and constraints: availability of parts or technicians able to perform the specified FAA procedures; potential need for local maintenance data or approvals if operators use an alternative method; recordkeeping to show compliance.\n- The AD references FAA material and a specific FedEx Engineering Order as an acceptable method of compliance. That gives operators a concrete compliance pathway but also means operators unfamiliar with that EO may need to obtain it or follow the FAA AD directly.\n- The affected fleet is narrowly defined (converted 727s under two STCs). Costs are concentrated on those operators; safety benefits are concentrated on users and crew of those particular aeroplanes.\n\n**Source claims vs trade-offs**\n\n- The AD reproduces the FAA’s safety findings as its rationale. The mechanical effect is to import the FAA-mandated corrective actions into Australian regulatory obligations (see \"Requirement\" and \"Compliance\" sections).\n- Trade-offs: the measure imposes real expense and operational disruption on a small set of operators in order to reduce the risk of door/ barrier failure. The instrument reduces operator freedom to defer or choose alternative corrective approaches unless approved by CASA; it does allow a specific alternative (the FedEx E.O.) that satisfies parts of the FAA AD.\n\n(References: Applicability; Requirement; Note on FedEx E.O.; Compliance; Background; Effective date and signature.)"},"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-b727-177-main-deck-cargo-door-hinge-cargo-door-system-and-cargo-barrier-1","history":"/api/acts/ad-b727-177-main-deck-cargo-door-hinge-cargo-door-system-and-cargo-barrier-1/history","analysis":"/api/acts/ad-b727-177-main-deck-cargo-door-hinge-cargo-door-system-and-cargo-barrier-1/analysis","conflicts":"/api/acts/ad-b727-177-main-deck-cargo-door-hinge-cargo-door-system-and-cargo-barrier-1/conflicts","importantCases":"/api/acts/ad-b727-177-main-deck-cargo-door-hinge-cargo-door-system-and-cargo-barrier-1/important-cases","documents":"/api/acts/ad-b727-177-main-deck-cargo-door-hinge-cargo-door-system-and-cargo-barrier-1/documents"}}