{"id":"F2006B09655","name":"AD/F100/52 Amdt 2 - Passenger Door Status Lights","slug":"ad-f100-52-amdt-2-passenger-door-status-lights","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115775,"registerId":"commonwealth-F2006B09655-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F100/52 Amdt 2 - Passenger Door Status Lights","content":"![](image.001.png)\n\n![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/F100/52 Amdt 1 and issues the following 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\n![](image.001.png)\n\nFokker F100 (F28 Mk 100) Series Aeroplanes\n\nAD/F100/52\n\nAmdt 2\n\n  \nPassenger Door Status Lights 3/2003\n\nApplicability: Model F.28 Mk.0070 and Mk.0100 aeroplanes with serial numbers listed in Fokker Service Bulletin (SB) F100-52-069 Revision 3 dated 18 December 2002.\n\nRequirement: Install additional passenger door status light indicators and new placards in accordance with Section 2, Part 1, 2 or 3 (as applicable) of SB F100-52-069 Revision 3.\n\nNote 1: The following Fokker Services’ Manual Change Notifications, both dated 3 December 2001, also pertain to this subject:\n\nMaintenance Documentation (MCNM) F100-064, and Operational Documentation (MCNO) F100-031.\n\nNote 2: CAA-NL (Netherlands) AD (BLA) 2002-057 (A) refers.\n\nCompliance: Before 1 December 2004.\n\nThis Amendment becomes effective on 20 March 2003.\n\nBackground: The CAA-NL of The Netherlands has advised that several instances have been reported of Fokker 100 ‘airstair’ type passenger doors opening during flight.\n\nInvestigations have concluded that these instances were not due to defects in the design of the operating mechanism or the warning system, but were probably the result of incorrect use of the locking handle.\n\nThe original issue of this Directive required additional door status indicator lights designed to improve the cabin crew awareness of the status of the door locking and latching system. At the same time, the Directive required the installation of new placards improving the presentation of normal and emergency door operating procedures.\n\nAmendment 1 required the addition of two diodes to the door status electrical circuits.\n\nThis Amendment requires an additional relay installation instead of using a new switch.\n\nFokker F100 (F28 Mk 100) Series Aeroplanes\n\nAD/F100/52 Amdt 2 (Continued)\n\nAmendment 1 of this Airworthiness Directive became effective on 28 November 2002.\n\nThe original issue of this Airworthiness Directive became effective on 11 July 2002.\n\n![Signature of James Coyne, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 4 February 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 26 February 2003.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The legislation maintains its original narrow scope: mandating specific safety modifications to Fokker F100 passenger door warning systems. While Amendment 2 changes the technical method (relay instead of switch), it does not expand beyond the original purpose of preventing in-flight door openings through improved crew awareness systems."},"complexity_factors":["Short, single-purpose document (approximately 400 words)","Only 3 defined references (SB F100-52-069 Revision 3, MCNM F100-064, MCNO F100-031)","Simple conditional structure: applicability → requirement → compliance deadline","No nested exceptions or complex cross-referencing to other legislation","Technical aviation terminology is present but explained through context (e.g., 'airstair' doors, 'relay', 'diodes')","Clear, linear amendment history (original → Amendment 1 → Amendment 2)"],"plain_english_summary":"This AD mandates installation of additional warning lights and new instruction placards on certain Fokker F28 Mk.0070/Mk.0100 (F100) airstair doors to prevent inadvertent in-flight opening after crew mis-operation of locking handles. It applies to specific serial-numbered aircraft named in Fokker service instructions and must be done by 1 December 2004.\n\nAmendment 2 keeps the original fixes and replaces a previously proposed switch with an additional relay in the warning circuit."},"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":false,"description":"The AD's safety objective remains the same — improve cabin crew awareness and prevent in-flight airstair-type door openings by adding indicators and placards. Amendments alter the technical means (first adding diodes, now requiring a relay) but do not broaden or narrow the population of affected aircraft or the core requirement to install indicators/placards (Background; Amendment 1; Requirement)."},"complexity_factors":["Applicability restricted to aircraft with serial numbers listed in SB F100-52-069 Rev 3 — requires cross-referencing the service bulletin to determine if an aircraft is affected (Applicability).","Technical electrical modification: change from diode/switch solution to a relay installation — requires avionics/maintenance work and verification (Background; Requirement).","Prescriptive compliance method: mandatory installation 'in accordance with' specific sections of the SB — limits operator flexibility and ties compliance to SB content (Requirement).","Fixed compliance deadline (1 December 2004) — creates scheduling and resource pressure for operators and maintenance organisations (Compliance).","Regulatory history: revocation of prior AD and prior amendment (Amendment 1) — operators must track amendments to understand current obligations (opening paragraphs; Background).","Related documentation updates: maintenance and operational manual change notifications (MCNM/MCNO) referenced — implies administrative work to update manuals and training materials (Note 1).","International coordination: reference to CAA-NL AD — may require harmonisation of parts, suppliers or approvals across jurisdictions (Note 2)."],"plain_english_summary":"This AD requires operators of specified Fokker F100 (F28 Mk 100) aircraft (serial numbers listed in Fokker SB F100-52-069 Revision 3) to install additional passenger door-status indicator lights, new placards, and an electrical relay modification in accordance with the service bulletin. Compliance must be achieved by 1 December 2004. CASA cites reports of in-flight airstair door openings as the safety rationale; operators bear installation, wiring and documentation costs and must follow the SB instructions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f100-52-amdt-2-passenger-door-status-lights","history":"/api/acts/ad-f100-52-amdt-2-passenger-door-status-lights/history","analysis":"/api/acts/ad-f100-52-amdt-2-passenger-door-status-lights/analysis","conflicts":"/api/acts/ad-f100-52-amdt-2-passenger-door-status-lights/conflicts","importantCases":"/api/acts/ad-f100-52-amdt-2-passenger-door-status-lights/important-cases","documents":"/api/acts/ad-f100-52-amdt-2-passenger-door-status-lights/documents"}}