{"id":"F2006B07872","name":"Airworthiness Directives 2004 - Revocation and Remaking - Fokker F50 (F27 Mk 50) Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-fokker-f50-f27-mk-50-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50856,"registerId":"commonwealth-F2006B07872-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - Fokker F50 (F27 Mk 50) Series Aeroplanes","content":"Airworthiness Directives 2004\n\nI, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety\n\nAuthority, acting under subregulation 39.001 (1) of the Civil\n\nAviation Safety Regulations 1998:\n\n(a) revoke the Airworthiness Directives mentioned in\n\nSchedule 1; and\n\n(b) make, as separate instruments, each Airworthiness\n\nDirective mentioned in Schedule 1 and attached.\n\n![](image.001.png)\n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority\n\n20 December 2004\n\nNote: Each attached Airworthiness Directive is being re-made in exactly the\n\nsame form as appears in the latest published edition of the Directive.\n\n  \nSchedule 1 Revocation and Remaking of\n\nAirworthiness Directives\n\nFokker F50 (F27 Mk 50) Series Aeroplanes\n\nAD Name AD Number\n\nCentral Windshield Post Connection to Pressure Bulkhead AD/F50/1\n\nAircraft Flight Manual and Minimum Equipment List Amendment AD/F50/2\n\nWing Structure - Skin Splice WS 7915 AD/F50/3 Amdt 1\n\nFire Sensing Element (Fire Wire) Bonding AD/F50/4\n\nCabin Pressure Control System AD/F50/5\n\nControl Cables in Accessory Compartment AD/F50/6\n\nDorsal Fin Gutter AD/F50/7\n\nPassenger Entrance Door Coamings AD/F50/8\n\nDoor External Handles AD/F50/9\n\nOutboard Nacelle Ventilation Air Inlets AD/F50/10\n\nWing Centre Section Cable Tray Blanking Plate AD/F50/11\n\nEngine Anti-Ice Control Unit AD/F50/12\n\nAccessory Bay Ventilation Air Outlet AD/F50/13\n\nOuter Wing End Rib Access Panel AD/F50/14 Amdt 1\n\nEngine Air Intake Seal AD/F50/15\n\nFlap Power Drive Unit AD/F50/16 Amdt 1\n\nFuel Collector Tank Supply Line AD/F50/17\n\nDoor Mechanism Gearbox Cover AD/F50/18\n\nEngine Controls AD/F50/19\n\nEngine Tailpipe Assembly AD/F50/20 Amdt 1\n\nForward Fuselage - Stringers and Frame 5775 AD/F50/21\n\nElevator Trim Cable Pulley Bracket and Mounting AD/F50/22\n\nElevator Control Rod Ends AD/F50/23\n\nEngine Control Rod Clearance AD/F50/24\n\nRadio Magnetic Indicators Wiring Change AD/F50/25\n\nForward Passenger Door Frame to Torsion Box Connection AD/F50/26 Amdt 1\n\nWindshield - Post Link Support Bracket- Forward Pressure Bulkhead AD/F50/27\n\nStringer 18 Between Stations 4875 and 5325 AD/F50/28\n\nElevator and Tab Pulley Bracket - Frame 3100 AD/F50/29\n\n  \nFuselage Upper Girder Connection at Frame Sta. 3415 AD/F50/30\n\nAccessory Compartment Cable Covers AD/F50/31\n\nElectrical Power - Terminal Block and Contactor Torque Values AD/F50/32 Amdt 1\n\nLanding Gear - Extension/Retraction Control AD/F50/33 Amdt 1\n\nElectrical Power - AC Emergency Inverter AD/F50/34\n\nEmergency Inverter Circuitry - CANCELLED AD/F50/35\n\nAlternate Brake System Cables AD/F50/36\n\nAuto Flight Idle Stop Mechanism AD/F50/37\n\nAuto Flight Idle Stop Mechanism Modification AD/F50/38\n\nElevator Torque Tube Bearing Plate Bolts AD/F50/39\n\nFire Wire Connector Replacement AD/F50/40\n\nOutboard Flap Drive AD/F50/41\n\nExternal Power Connection Relay Fitment AD/F50/42 Amdt 1\n\nFuselage - Flight Compartment Window Frames -1 AD/F50/43\n\nFuselage - Flight Compartment Window Frames -2 AD/F50/44\n\nFuselage Power Supply Box Surround Structure AD/F50/45\n\nForward Fuselage Skin Dimples AD/F50/46\n\nNose Landing Gear Retraction Mechanism AD/F50/47\n\nRH Nacelle Aft Cone Fairing Fork-End Assemblies AD/F50/48\n\nWindshield Wiper Rotary Selector Switch Replacement AD/F50/49\n\nWindshield Wiper System AD/F50/50\n\nAuto Feather Control Unit AD/F50/51\n\nCockpit Window Post Attach Angles AD/F50/52\n\nFuselage Skin Above Forward Passenger Door AD/F50/53\n\nFuselage Skin to Stringer and Skin to Frame Connections AD/F50/54\n\nAutoflight - Autopilot Computer - Replacement AD/F50/55\n\nCollector Tank Strap Assemblies and Fuel Lines AD/F50/56 Amdt 1\n\nNLG Hinge Point AD/F50/57\n\nMLG Sliding Member Out-Stop Assembly AD/F50/58 Amdt 4\n\nEngine Electronic Control System AD/F50/59\n\nBottom Hinged Cowl Door AD/F50/60 Amdt 1\n\nAileron Trim Screwjack Capscrews AD/F50/61\n\nLights - Rear Cabin Exit Sign AD/F50/62\n\nControl Panel Lighting Plates AD/F50/63\n\nSeat Rails Tapered Shims AD/F50/64\n\nAileron Hinge Bolt and Spring-Tab Balance Unit AD/F50/65\n\n  \nLavatory Pump and Filter Assembly Electrical Grounding AD/F50/66\n\nMain Landing Gear Drag Stay Tubes AD/F50/67\n\nLower Cowling By-Pass Duct Opening AD/F50/68\n\nIn Wing Aileron Control Cables AD/F50/69 Amdt 2\n\nLH Elevator Drainage AD/F50/70\n\nWings - Bottom Skin Access Covers AD/F50/71\n\nMain Landing Gear Lock Link AD/F50/72\n\nHub Mounting Face Dowel Hole Inspection Following Propeller Overtorque AD/F50/73\n\nGround Idle Stop Assembly AD/F50/74\n\nAft Fuselage Skin Joint AD/F50/75\n\nTime Limits/Maintenance Checks - Maintenance Requirements AD/F50/76 Amdt 1\n\nStabilizer De-Icing Monitoring System AD/F50/77\n\nOuter Wing Stringer-to-Rib Connections AD/F50/78 Amdt 1\n\nControl Surfaces Leading Edge Attachment AD/F50/79 Amdt 4\n\nFlight Crew Seat Shoulder Harness AD/F50/80\n\nTCAS Antenna Structural Provisions AD/F50/81\n\nBleed Air Supply Duct Assembly - Inspection/Modification AD/F50/82\n\nGrimes Aerospace Passenger Service Units AD/F50/83\n\nFuel - Ventilation float valve & sniffle valve AD/F50/84 Amdt 1\n\nReplace Feathering Pump Gasket AD/F50/85\n\nSkid Control Unit AD/F50/86\n\nPitot & Static Port Heating Wiring AD/F50/87\n\nPower Plant - Feathering pump AD/F50/88\n\nCargo Restraint Strap Assemblies AD/F50/89","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Scope is not changed. The instrument explicitly revokes listed ADs and remakes each in \"exactly the same form\" as the latest published edition (note). Therefore substantive obligations remain unchanged; the action is procedural (revocation and re‑issuance) rather than substantive amendment."},"complexity_factors":["Legal basis: action taken under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998 (instrument header).","Volume: Schedule 1 lists a large number of distinct ADs covering many components and systems (Schedule 1).","Administrative procedure: simultaneous revocation and re‑making of multiple ADs as separate instruments increases record‑keeping and version control obligations for regulators and operators (operation paragraphs (a) and (b)).","Amendment history: several entries are suffixed 'Amdt' or marked 'CANCELLED', requiring attention to amendment status and historic compliance (Schedule 1).","Technical breadth: ADs address airframe, engines, systems, avionics and emergency equipment, involving multiple maintenance disciplines and suppliers (Schedule 1 item list).","Regulatory effect: remaking ADs 'in exactly the same form' (note) implies no substantive change but preserves ongoing mandatory compliance, so costs are primarily administrative and operational for operators (note)."],"plain_english_summary":"Revokes the listed Airworthiness Directives (ADs) for Fokker F50 (F27 Mk 50) aeroplanes and reissues each AD as a separate, identical instrument under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998. The delegate of the Civil Aviation Safety Authority, David Alan Villiers, signed the instrument.\n\nThis affects owners, operators and maintenance organisations of Fokker F50 aircraft because the ADs set mandatory inspection, modification and maintenance obligations. The instrument states the remade ADs are \"exactly the same\", so substantive duties remain while administrative re-documentation and compliance tracking fall to regulated parties."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument maintains the exact same scope as the original Airworthiness Directives. The note explicitly states each directive is being remade 'in exactly the same form as appears in the latest published edition of the Directive.' This is purely a procedural reissuance under current regulatory authority, not an expansion of regulatory scope."},"complexity_factors":["Single, clear operative provision with two straightforward actions (revocation and remaking)","No conditional logic or nested exceptions in the main instrument","Extensive schedule (89 items) but presented as a simple table without substantive legal content in this instrument","No defined terms requiring interpretation within this instrument itself","Cross-reference to external regulations (Civil Aviation Safety Regulations 1998) but no complex internal cross-referencing","Note clarifies that substantive content is unchanged, reducing interpretive burden"],"plain_english_summary":"CASA has revoked and immediately reissued 89 Airworthiness Directives for the Fokker F50, remaking each directive in the same form under updated regulatory authority. This is an administrative refresh of the legal instruments, not a change to the safety requirements.\n\nIt affects Fokker F50 owners, operators and maintenance organisations in Australia who must continue to comply with the unchanged, mandatory safety instructions."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-fokker-f50-f27-mk-50-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-fokker-f50-f27-mk-50-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-fokker-f50-f27-mk-50-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-fokker-f50-f27-mk-50-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-fokker-f50-f27-mk-50-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-fokker-f50-f27-mk-50-series-aeroplanes/documents"}}