{"id":"F2006B09892","name":"AD/F50/63 - Control Panel Lighting Plates","slug":"ad-f50-63-control-panel-lighting-plates","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55041,"registerId":"commonwealth-F2006B09892-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F50/63 - Control Panel Lighting Plates","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nFokker F50 (F27 Mk 50) Series Aeroplanes\n\nAD/F50/63 Control Panel Lighting Plates 1/94\n\nApplicability: Model F27 Mk 050 serial numbers 20103 to 20231 inclusive if equipped with either Electrical Power Control Panels part numbers F7941-011-407, -413, -425, -435 and W7981-011-401, \\-403, all serial numbers or Fuel Control Panels part numbers F7941- 005-403, -407, -409, -413, -415 and W7981-005-401, all serial numbers.\n\nRequirement: Action in accordance with Fokker Service Bulletin F50-33-030 dated 15 September 1993.\n\nNote: RLD AD 93-141 (A) dated 1 November 1993 refers.\n\nCompliance: Prior to 1 January 1995.\n\nBackground: Operators have reported that EL-Products Lighting Plates part number 95-1847-1 (installed on Electrical Power Control Panels) and part number 95-1838-1 and -3 (installed on Fuel Control Panels) may suffer from material stress. These stresses have caused internal short circuits, which in turn resulted in burned spots on the lighting panels and in some cases, smoke and noxious fumes were evident in the cockpit. Compliance with this Directive will decrease the likelihood of electrical short circuits in the Lighting Plates occurring.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive implements remedial work set out in the Fokker service bulletin for the identified panels and serials to mitigate reported material stress and electrical short risks. It confines action to the specified parts and serial numbers and fixes a compliance deadline, without broadening or narrowing the stated technical scope beyond that remedial purpose."},"complexity_factors":["Narrow applicability: limited to F27 Mk50 serial numbers 20103–20231 and specific part numbers, requiring operators to check serial/part records.","Dependence on an external technical document: compliance requires following Fokker Service Bulletin F50‑33‑030 (the AD does not reproduce technical steps).","Safety‑critical electrical work: inspections/replacements involve qualified maintenance, potential parts procurement and aircraft downtime.","Hard deadline (prior to 1 January 1995) creates scheduling and resource pressure for affected operators.","Administrative actions: operators must record compliance with the AD and coordinate maintenance organisations.","Diagnosis complexity: determining 'material stress' and whether replacement is needed may require technical assessment."],"plain_english_summary":"Requires inspection, modification or replacement of specified Electrical Power and Fuel Control Panel lighting plates on Fokker F27 Mk50 aeroplanes (serials 20103–20231) by following Fokker Service Bulletin F50‑33‑030. Operators or their maintenance organisations must complete the work before 1 January 1995. The directive responds to reported material stress in EL‑Products lighting plates that caused internal short circuits, burns and cockpit smoke; operators pay for and schedule the corrective maintenance to remove the short‑circuit risk."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific manufacturing defect in specific aircraft components. It has not expanded beyond its original purpose of mandating a particular repair."},"complexity_factors":["Single, specific technical requirement (comply with one service bulletin)","Limited applicability (one aircraft model, specific serial number range, specific part numbers)","No nested exceptions or conditional logic","Clear compliance deadline","Only 2 defined part number categories (Electrical Power Control Panels and Fuel Control Panels)","Straightforward cause-and-effect background explanation"],"plain_english_summary":"This Airworthiness Directive requires operators of Fokker F50 aircraft (serials 20103–20231) fitted with the listed Electrical Power Control Panel and Fuel Control Panel part numbers to carry out the repair in Fokker Service Bulletin F50-33-030 before 1 January 1995. It addresses cracked lighting plates that can short, burn and produce toxic smoke in the cockpit — a direct flight-safety and crew/passenger hazard."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f50-63-control-panel-lighting-plates","history":"/api/acts/ad-f50-63-control-panel-lighting-plates/history","analysis":"/api/acts/ad-f50-63-control-panel-lighting-plates/analysis","conflicts":"/api/acts/ad-f50-63-control-panel-lighting-plates/conflicts","importantCases":"/api/acts/ad-f50-63-control-panel-lighting-plates/important-cases","documents":"/api/acts/ad-f50-63-control-panel-lighting-plates/documents"}}