{"id":"F2006B09910","name":"AD/F50/8 - Passenger Entrance Door Coamings","slug":"ad-f50-8-passenger-entrance-door-coamings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55107,"registerId":"commonwealth-F2006B09910-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F50/8 - Passenger Entrance Door Coamings","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Fokker F50 (F27 Mk 50) Series Aeroplanes\n\n \n\nAD/F50/8 Passenger Entrance Door Coamings 3/89\n\nApplicability: F27-050 S/Nos 20103 to 20108 and 20110 to 20117. Requirement:  Action in accordance with Fokker SB F50-25-005.\n\nNote: RLD AD 88-90 refers.\n\n \n\nCompliance: Prior to 30 June 1989.\n\n \n\nBackground:  The upper coaming panel above the passenger entrance door velcro attachment has been found to be insecure. This may cause the coaming to drop and block the door during an emergency disembarkation.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD applies to a defined set of serial-numbered F27-050 aeroplanes and mandates action per a Fokker service bulletin to be completed by 30 June 1989 (Applicability; Requirement; Compliance). The text does not indicate any expansion or narrowing of scope relative to prior measures; it only refers to RLD AD 88-90 without stating that this AD changes that prior directive's applicability or obligations (Note)."},"complexity_factors":["Limited and specific applicability to a small set of serial numbers (Applicability)","Mandates compliance with an external document (Fokker SB F50-25-005) rather than containing technical steps itself (Requirement)","Fixed, near-term compliance deadline (Compliance)","Reference to a prior directive without reproducing its content (Note), requiring cross-checking","No articulation in the AD text of alternative compliance routes, exemptions, or administrative remedies (Requirement; Compliance)"],"plain_english_summary":"What this instrument does\n\n- This airworthiness directive (AD) requires specific Fokker F27-050 (F50) aeroplanes to be inspected and fixed in the way described by the manufacturer's service bulletin Fokker SB F50-25-005. (Requirement)\n- The AD applies only to aeroplanes with serial numbers 20103–20108 and 20110–20117. (Applicability)\n- The work must be completed before 30 June 1989. (Compliance)\n\nWhy it was issued (stated reason)\n\n- The upper coaming panel above the passenger entrance door velcro attachment was found to be insecure. If it drops it could block the door during an emergency disembarkation. (Background)\n\nWho decides and who pays\n\n- The regulator (Civil Aviation Safety Authority, via this AD) requires the action and sets the deadline. (header and Compliance)\n- The aircraft owners/operators of the affected serial-numbered aeroplanes must arrange and pay for the corrective action required by the Fokker service bulletin. (Applicability; Requirement)\n\nHow it works mechanically\n\n- The AD does not set out repair steps itself; it mandates compliance with Fokker SB F50-25-005, so the technical remedy and the tasks to be performed are those in that service bulletin. (Requirement)\n- Compliance is mandatory for the listed serial numbers by the date stated. The AD refers to a previous directive (RLD AD 88-90) but does not reproduce any of its content. (Note)\n\nCosts, incentives and trade-offs (mechanical and behavioural effects)\n\n- Direct cost and downtime: affected operators bear the financial cost and aircraft downtime needed to perform the work specified in the service bulletin. The AD’s Compliance deadline concentrates the timing of that burden. (Applicability; Requirement; Compliance)\n- Concentrated beneficiaries and concentrated costs: the safety benefit (reduced risk of a coaming blocking an exit) accrues to passengers and crew of the affected aircraft, while the financial and operational burden falls specifically on the owners/operators of those serial-numbered aeroplanes. (Background; Applicability)\n- Implementation dependency: the AD delegates the technical details to the manufacturer’s bulletin, so effectiveness depends on following that external document and on availability of parts/approved maintenance capability. The AD itself does not provide alternative technical options. (Requirement)\n- Operational trade-off: operators may need to schedule maintenance or temporarily remove aircraft from service before the compliance date, which has productivity and scheduling effects. (Compliance)\n\nCompliance burden and discretion\n\n- The directive imposes a clear, time-limited duty to act for the listed aircraft; it does not in this text describe exemptions or alternative means of compliance. (Requirement; Compliance)\n- The regulator sets the requirement and deadline; the specific technical means to comply are set out in the referenced service bulletin, not in the AD text. That creates reliance on the manufacturer’s procedures for execution. (Requirement)\n\nImplementation risks and practical notes\n\n- If the service bulletin cannot be followed as written (for example, for lack of parts or approved facilities), the AD text does not specify how to seek an alternative approval or extension; such processes would be handled under the regulator’s usual administrative procedures (not described here). (Requirement; Compliance)\n- The AD references a previous directive (RLD AD 88-90) but provides no detail on whether that earlier AD overlaps or differs, so operators should check that earlier document to understand any related obligations. (Note)\n\nSource citations (headings from the instrument)\n\n- Applicability: \"F27-050 S/Nos 20103 to 20108 and 20110 to 20117.\" (Applicability)\n- Requirement: \"Action in accordance with Fokker SB F50-25-005.\" (Requirement)\n- Compliance: \"Prior to 30 June 1989.\" (Compliance)\n- Background: insecure upper coaming panel above the passenger entrance door velcro attachment that may block the door during emergency disembarkation. (Background)\n- Note: \"RLD AD 88-90 refers.\" (Note)\n"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of ensuring emergency exit accessibility."},"complexity_factors":["Extremely short document (under 150 words)","Only 1 defined applicability criterion (specific serial numbers)","Single, unambiguous compliance action (follow manufacturer service bulletin)","No cross-references to other legislation (only a reference to a related Dutch aviation directive 'RLD AD 88-90' in a note)","No conditional logic or exceptions","Clear, fixed compliance date"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific Fokker F50 aircraft (serial numbers 20103-20108 and 20110-20117).\n\n**What it does:**\n- Requires aircraft operators to inspect and fix a problem with the **passenger entrance door coaming** (the frame or surround around the door)\n- The specific fix must follow **Fokker Service Bulletin F50-25-005** (a technical instruction from the manufacturer)\n\n**The safety issue:**\n- The upper panel above the door, which attaches with velcro, can become loose\n- If this happens during an emergency evacuation, the coaming could drop down and **block the door**, trapping passengers inside\n\n**Who must comply:**\n- Operators of the affected Fokker F50 aircraft\n- **Deadline:** Before 30 June 1989\n\n**Why it matters:**\nThis is a **life-safety issue**. In an emergency, every second counts. A blocked exit could mean the difference between life and death for passengers trying to evacuate. The directive forces operators to fix the problem before a tragedy occurs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f50-8-passenger-entrance-door-coamings","history":"/api/acts/ad-f50-8-passenger-entrance-door-coamings/history","analysis":"/api/acts/ad-f50-8-passenger-entrance-door-coamings/analysis","conflicts":"/api/acts/ad-f50-8-passenger-entrance-door-coamings/conflicts","importantCases":"/api/acts/ad-f50-8-passenger-entrance-door-coamings/important-cases","documents":"/api/acts/ad-f50-8-passenger-entrance-door-coamings/documents"}}