{"id":"F2006B09891","name":"AD/F50/62 - Lights - Rear Cabin Exit Sign","slug":"ad-f50-62-lights-rear-cabin-exit-sign","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55036,"registerId":"commonwealth-F2006B09891-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F50/62 - Lights - Rear Cabin Exit Sign","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/F50/62 Lights - Rear Cabin Exit Sign 12/93\n\nApplicability: F27 Mk 050 serial numbers identified in the requirement document. Requirement: Action in accordance with the technical requirements of RLD Airworthiness\n\nDocument BLA 93-106 (A).\n\n \n\nNote: Fokker Service Bulletin SBF50-33-028 refers.\n\n \n\nCompliance: Prior to 11 May 1994.\n\n \n\nBackground:  In some aircraft configurations, the exit sign on the cargo compartment door is obscured from view.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-limited safety directive with a narrow, specific purpose (fixing exit sign visibility on particular aircraft). It has not expanded beyond its original intent."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined reference (RLD Airworthiness Document BLA 93-106 (A))","Single, unambiguous compliance requirement with fixed deadline","No nested conditions, exceptions, or cross-references to other legislation","Background explanation provided in plain language","Applicability limited to specific aircraft serial numbers in external document"],"plain_english_summary":"**What this is:** An Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:** Requires owners/operators of specific Fokker F50 aircraft to fix a visibility problem with the rear cabin exit sign. In some configurations, the exit sign on the cargo compartment door was blocked from view, which could be dangerous in an emergency evacuation.\n\n**Who it affects:** Operators of Fokker F50 aircraft (specifically F27 Mk 050 series) with serial numbers listed in a technical document called \"RLD Airworthiness Document BLA 93-106 (A)\".\n\n**What must be done:** Aircraft operators must follow the technical instructions in that RLD document to correct the exit sign visibility issue.\n\n**When:** The fix had to be completed before 11 May 1994.\n\n**Why it matters:** Exit signs need to be clearly visible so passengers and crew can find emergency exits quickly. If blocked, people might not escape safely during an emergency. This directive ensures the aircraft meets basic safety standards for passenger evacuation."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD applies to F27 Mk 050 aeroplanes identified by serial number and requires action per RLD Airworthiness Document BLA 93-106 (A) to correct an obscured cargo exit sign, with a fixed compliance date. The supplied text contains no indication that the scope of affected aircraft or the nature of the requirement has been changed from any prior instrument; therefore no scope change is shown in the provided material (Applicability; Requirement; Compliance; Background)."},"complexity_factors":["Applicability determined by specific serial numbers rather than a broad model-wide rule (Applicability) — requires checking aircraft records.","Technical requirements are contained in an external RLD Airworthiness Document (BLA 93-106 (A)) rather than in the AD text itself (Requirement) — implementers must obtain and apply that document.","Reference to manufacturer Service Bulletin (SBF50-33-028) as additional technical material (Note) — multiple documents to reconcile.","Hard compliance deadline creates scheduling pressure but the AD excerpt contains no cost, downtime, or enforcement detail (Compliance).","Background identifies a configuration-dependent issue (obscured exit sign) which requires configuration assessment on each affected aircraft (Background)."],"plain_english_summary":"This instrument requires owners/operators of the listed Fokker F50 (F27 Mk 050) serial-numbered aircraft to carry out a technical remedy — as specified in RLD Airworthiness Document BLA 93‑106 (A) (with Service Bulletin SBF50‑33‑028 referenced) — to correct an obscured rear cabin/cargo exit sign. The corrective work must be completed before 11 May 1994."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f50-62-lights-rear-cabin-exit-sign","history":"/api/acts/ad-f50-62-lights-rear-cabin-exit-sign/history","analysis":"/api/acts/ad-f50-62-lights-rear-cabin-exit-sign/analysis","conflicts":"/api/acts/ad-f50-62-lights-rear-cabin-exit-sign/conflicts","importantCases":"/api/acts/ad-f50-62-lights-rear-cabin-exit-sign/important-cases","documents":"/api/acts/ad-f50-62-lights-rear-cabin-exit-sign/documents"}}