{"id":"F2007L02134","name":"AD/B737/304 - Flight Deck Door Wiring Looms","slug":"ad-b737-304-flight-deck-door-wiring-looms","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67297,"registerId":"commonwealth-F2007L02134-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/B737/304 | Flight Deck Door Wiring Looms | 8/2007 |\n| ----------- | ----------------------------- | ------ |\n\n| Applicability: | Model 737-300, -400 and -500 series aeroplanes equipped with flight deck door assembly part number B221001 under United Stated Federal Aviation Administration (FAA) supplemental Type Certificate (STC) ST01335LA. |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Perform a general visual inspection for chafing of wire bundles in the area of the flight deck door in accordance with the Accomplishment Instructions of C&D Aerospace Alert Service Bulletin (ASB) B221001-52A02, dated 5 November 2002. |\n| | Note 1: For the purposes of this Directive, a general visual inspection is \"a visual examination of an interior or exterior area, installation or assembly to detect obvious damage, failure or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normal available lighting conditions such as daylight, hangar lighting, flashlight or drop- light and may require removal or opening of access panels or doors. Stands, ladders or platforms may be required to gain proximity to the area being checked.'' |\n| | 2. Correct any discrepancies detected during the Requirement 1 inspection in accordance with the Accomplishment Instructions of ASB B221001-52A02. |\n| | Note 2: FAA AD 2007-10-12 Amdt 39-15053 refers. |\n| Compliance: | For Requirement 1 - Within 18 months after the effective date of this Directive. |\n| | For Requirement 2 - Before further flight after the Requirement 1 inspection. |\n| | This Airworthiness Directive becomes effective on 2 August 2007. |\n| Background: | This Directive is complementary to AD/B737/217 Amdt 1 and requires a visual inspection and, if necessary, corrective actions to be performed on additional model aircraft to those identified in the FAA Airworthiness Directive referenced in AD/B737/217 Amdt 1. |\n\n| | This Directive is issued to detect and correct wire chafing, which could result in arcing, fire, and/or reduced controllability of the aeroplane. |\n| --- | ------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png) \nDavid Punshon \nDelegate of the Civil Aviation Safety Authority\n\n21 June 2007","sortOrder":0},{"sectionNumber":"AD/B737/304","sectionType":"part","heading":"AD/B737/304","content":"## AD/B737/304","sortOrder":1},{"sectionNumber":"Flight Deck Door Wiring Looms","sectionType":"part","heading":"Flight Deck Door Wiring Looms","content":"## Flight Deck Door Wiring Looms","sortOrder":2},{"sectionNumber":"8/2007","sectionType":"part","heading":"8/2007","content":"## 8/2007","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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"The Directive expands the set of affected aircraft beyond those named in the FAA AD referenced in AD/B737/217 Amdt 1 by adding additional model aeroplanes fitted with the specified STC P/N B221001, and therefore broadens the scope of required inspections and corrections (Background; Applicability)."},"complexity_factors":["Targeted applicability narrow but technical: only Model 737-300/-400/-500 aeroplanes fitted with flight deck door assembly P/N B221001 under FAA STC ST01335LA (Applicability).","Mandatory action is a ‘general visual inspection’ defined to potentially require removal/opening of access panels, use of mirrors, stands, ladders and lighting—raising practical access and labour needs (Requirement 1; Note 1).","Corrective actions must follow the specific Accomplishment Instructions of C&D Aerospace ASB B221001-52A02, creating dependency on an external service bulletin for methods and standards (Requirement 1 & 2).","Timing imposes operational constraint: inspection within 18 months, but any detected defect must be corrected before further flight, which can ground an aircraft pending repair (Compliance; Requirement 2).","Regulatory linkage and cross-references: the Directive is complementary to AD/B737/217 Amdt 1 and references FAA AD 2007-10-12, so operators must track multiple directives and their overlaps (Background; Note 2).","Who pays/acts: aircraft operators or maintainers bear inspection and repair costs and must implement the ASB instructions; the Civil Aviation Safety Authority issues the directive (Requirement 1 & 2; signature block).","Risk of varying interpretation: the practical scope of a ‘general visual inspection’ can differ between maintenance organisations, creating potential variance in compliance execution (Note 1)."],"plain_english_summary":"This directive requires operators of Boeing 737-300/-400/-500 aeroplanes fitted with flight deck door assembly P/N B221001 (per FAA STC ST01335LA) to perform a general visual inspection for wire-bundle chafing around the flight deck door and to repair any defects using C&D Aerospace ASB B221001-52A02. It matters because the rule aims to prevent wiring chafe that the directive says could cause arcing, fire or reduced aircraft controllability; inspections are due within 18 months and repairs must be completed before further flight."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific wiring safety issue on specific Boeing 737 models with a particular cockpit door modification. The document explicitly states it is 'complementary' to an earlier directive and expands coverage to additional models, which is consistent with the standard purpose of airworthiness directives."},"complexity_factors":["Single, specific technical requirement with clear applicability criteria","Only 2 substantive requirements (inspect, then repair if needed)","Minimal defined terms (only one technical definition provided in Note 1 for 'general visual inspection')","No cross-references to other legislation beyond a single related FAA AD and service bulletin","Straightforward compliance timeline (18 months for inspection, immediate for repairs)","Short document length (approximately 300 words of substantive content)"],"plain_english_summary":"This AD requires operators of Boeing 737-300/-400/-500 aircraft fitted with cockpit door P/N B221001 (ST01335LA) to visually inspect wiring near the flight deck door within 18 months for chafing and damage, and to repair any defects before further flight. It addresses wire abrasion that could cause arcing, fire, or loss of control, affecting airlines and maintenance organizations, and expands an earlier AD (AD/B737/217) to cover additional aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-304-flight-deck-door-wiring-looms","history":"/api/acts/ad-b737-304-flight-deck-door-wiring-looms/history","analysis":"/api/acts/ad-b737-304-flight-deck-door-wiring-looms/analysis","conflicts":"/api/acts/ad-b737-304-flight-deck-door-wiring-looms/conflicts","importantCases":"/api/acts/ad-b737-304-flight-deck-door-wiring-looms/important-cases","documents":"/api/acts/ad-b737-304-flight-deck-door-wiring-looms/documents"}}