{"id":"F2008L00625","name":"AD/F100/87 - Downward Opening Passenger Door","slug":"ad-f100-87-downward-opening-passenger-door","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":72652,"registerId":"commonwealth-F2008L00625-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Fokker F100 (F28 Mk 100) Series Aeroplan","sectionType":"division","heading":"Fokker F100 (F28 Mk 100) Series Aeroplanes","content":"### Fokker F100 (F28 Mk 100) Series Aeroplanes\n\n| AD/F100/87 | Downward Opening Passenger Door | 3/2008 |\n| ---------- | ------------------------------- | ------ |\n\n| Applicability: | Model F28 Mark 0070 and Mark 0100 aircraft, all serial numbers, if equipped with a downward-opening ‘airstair’ type passenger door.                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the requirements of EASA AD 2008-0020.Note: Fokker Service Bulletins SBF100-11-025 Revision 1 and SBF100-52-086 original issue, or later EASA approved revisions, refer.                                                                                                                                                                                                                                                                                                                                                                                                                |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of13 March 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n|                | This Airworthiness Directive becomes effective on 13 March 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| Background:    | Following a red illuminated “DOOR NOT LOCKED” status light indication on the door lock indication panel after lift off, the cabin crew operated the door lock handle. This resulted in inadvertent opening of the downward-opening passenger door during flight. Fokker 70/100 Service Letter 272 informs operators not to operate the door lock handle after the aircraft has started to move or before it has come to a complete standstill. This Directive requires installation of a warning placard and a one-time inspection of the clearance between lever part number A26997-003 and the Up-Limit Switch. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n1 February 2008","sortOrder":0},{"sectionNumber":"AD/F100/87","sectionType":"part","heading":"AD/F100/87","content":"## AD/F100/87","sortOrder":1},{"sectionNumber":"Downward Opening Passenger Door","sectionType":"part","heading":"Downward Opening Passenger Door","content":"## Downward Opening Passenger Door","sortOrder":2},{"sectionNumber":"3/2008","sectionType":"part","heading":"3/2008","content":"## 3/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific mechanical issue with a specific aircraft type. The scope remains narrow and technical, exactly as intended for airworthiness directives."},"complexity_factors":["Very short document (under 300 words)","Only 2 specific technical actions required (placard installation + one inspection)","Single cross-reference to an EASA directive (European Aviation Safety Agency)","No nested conditions or exceptions","Clear applicability criteria (specific aircraft models with specific door type)","Plain language background explaining the incident that triggered the directive"],"plain_english_summary":"This mandatory Airworthiness Directive affects operators of Fokker F100 and F70 aircraft equipped with downward-opening passenger doors. It requires measures to prevent crew from operating the door lock while the aircraft is moving and a one-time check of door-lock clearance to ensure the up-limit switch functions. Compliance prevents accidental in-flight door opening, reducing risk of decompression, injury, or loss of control."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive is a narrowly targeted safety measure responding to a specific in-service event (inadvertent opening of a downward-opening passenger door). Its actions (a warning placard and a one-time inspection of lever-to-switch clearance) are consistent with that original safety-focused intent. The current version does not broaden the scope beyond that purpose; it simply implements a corrective, limited-scope requirement and points to EASA and manufacturer service information for the technical details."},"complexity_factors":["Narrow applicability: only Model F28 Mark 0070 and Mark 0100 with downward-opening airstair doors","References an external regulatory document (EASA AD 2008-0020) for the detailed actions","References two Fokker service bulletins (SBF100-11-025 Rev 1 and SBF100-52-086) or later approved revisions","Actions required are limited and specific: install placard and one-time clearance inspection","Clear effective date and single compliance timeline (one-time action), minimal conditional logic","Some dependence on later EASA-approved revisions creates a minor version-control complexity"],"plain_english_summary":"**What this instrument does (mechanically):**\n\n- It requires operators of certain Fokker F100 (F28 Mk 100) series aeroplanes (Model F28 Mark 0070 and Mark 0100, all serial numbers) that are fitted with a downward-opening \"airstair\" passenger door to carry out actions set out in EASA Airworthiness Directive (AD) 2008-0020. (See \"Applicability\" and \"Requirement\".)\n- The specified actions are: install a warning placard, and perform a one-time inspection of the clearance between the door lock lever (part number A26997-003) and the Up-Limit Switch. The AD references Fokker Service Bulletins SBF100-11-025 Rev 1 and SBF100-52-086 or later EASA-approved revisions. (See \"Requirement\" and Note.)\n- The directive becomes effective 13 March 2008 and requires compliance as set out in the referenced EASA AD. (See \"Compliance\".)\n\n**Who this affects:**\n\n- Aircraft operators/owners of F28 Mark 0070 and Mark 0100 aircraft fitted with downward-opening airstair passenger doors.\n- Maintenance organisations or technicians who perform the inspection and install the placard.\n- Flight and cabin crew indirectly: the placard and inspection are intended to prevent inadvertent door operation in flight. (See \"Applicability\" and \"Background\".)\n\n**Why it matters (official rationale and a practical check):**\n\n- Official rationale: After takeoff a red \"DOOR NOT LOCKED\" light appeared and cabin crew operated the door lock handle, which led to an inadvertent opening of the downward-opening passenger door in flight. The AD implements a mitigation: a placard warning and a one-time mechanical clearance check to reduce the risk of the same sequence recurring. (See \"Background\".)\n\n- Practical effect: The placard changes in-cockpit/cabin information available to crew (a behavioural nudge not to operate the handle after movement), and the clearance inspection checks whether the lever and the Up-Limit Switch sit correctly to prevent mechanical mis-actuation. Together they aim to reduce the chance of in-flight door opening.\n\n**Who pays and who decides:**\n\n- Aircraft operators pay for the placard and the inspection (labour, possible maintenance downtime, and any corrective work if clearance is out of tolerance). The maintenance organisation that carries out the work decides how to schedule it within airworthiness and operational constraints.\n\n**Compliance burden and implementation risk:**\n\n- Compliance burden is limited and one-time: install a placard and perform a single inspection. If the inspection finds out-of-tolerance clearance, further corrective work may be needed, which raises time and cost.\n- Implementation depends on following the referenced EASA AD and the Fokker service bulletins. If operators use later EASA-approved revisions, they must ensure the revision chosen is approved and correctly interpreted.\n- There is some operational risk if crews do not observe the placard or if maintenance incorrectly measures or adjusts clearance. The AD reduces this risk by making the inspection mandatory.\n\n**Costs, incentives, and trade-offs:**\n\n- Direct cost to operators: minimal for placard plus inspection time; potentially higher if corrective work is needed.\n- Concentrated benefit: operators of the specific Fokker models receive the safety benefit; the broader public receives diffuse benefit via reduced accident risk.\n- Trade-offs: a small, short-term maintenance cost and potential aircraft downtime versus the safety benefit of preventing a door opening in flight. The instrument uses a low-cost, targeted technical and procedural fix rather than a large redesign.\n\n**Other implementation notes:**\n\n- The AD relies on the EASA AD and specific Fokker service bulletins; operators should use the latest EASA-approved revision referenced by their regulator. (See \"Requirement\" and Note.)\n- The AD does not introduce ongoing recurring inspections or operational prohibitions beyond the placard and the one-time inspection; it is limited in scope and remedial in nature. (See \"Requirement\" and \"Background\".)"},"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-f100-87-downward-opening-passenger-door","history":"/api/acts/ad-f100-87-downward-opening-passenger-door/history","analysis":"/api/acts/ad-f100-87-downward-opening-passenger-door/analysis","conflicts":"/api/acts/ad-f100-87-downward-opening-passenger-door/conflicts","importantCases":"/api/acts/ad-f100-87-downward-opening-passenger-door/important-cases","documents":"/api/acts/ad-f100-87-downward-opening-passenger-door/documents"}}