{"id":"F2006B08029","name":"Airworthiness Directives 2004 - Revocation and Remaking - Sikorsky S-76 Series Helicopters","slug":"airworthiness-directives-2004-revocation-and-remaking-sikorsky-s-76-series-helicopters","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115098,"registerId":"commonwealth-F2006B08029-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - Sikorsky S-76 Series Helicopters","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\nSikorsky S-76 Series Helicopters\n\nAD Name AD Number\n\nFuselage Tail Cone Inspections AD/S-76/1 Amdt 2\n\nEngine Oil Filler Service Door - Modification AD/S-76/2\n\nEngine Air Inlet Cowl and Aft Cowl Assemblies - Modification AD/S-76/3 Amdt 1\n\nMain Rotor Hub - Inspection - CANCELLED AD/S-76/4 Amdt 1\n\nPower Plant Forward Tripod Support - Inspection - CANCELLED AD/S-76/5\n\nHydraulic Pumps - Replacement AD/S-76/6\n\nMain Transmission Support Structure Fitting Assemblies - Inspection - AD/S-76/7 Amdt 1\n\nRetirement Lives AD/S-76/8 Amdt 11\n\nCyclic Torque Tube - Inspection of Centre Support Bearing Housing AD/S-76/9\n\nMGB Tip Plate Assembly Retention Bolts - CANCELLED AD/S-76/10\n\nMain Rotor Spindle Assembly - Inspection and Modification - CANCELLED AD/S-76/11 Amdt 1\n\nUpper Deck Flight Controls Installation - Modification AD/S-76/12\n\nTail Rotor Outboard Retaining Plate Bolts - Inspection AD/S-76/13\n\nFuselage Bulkhead - Engine Support Fitting Area - Inspection and Modification AD/S-76/14\n\nMain Rotor Damper Piston Rod - Inspection - CANCELLED AD/S-76/15\n\nMain Rotor Blade Root End - Inspection for Fatigue Cracking AD/S-76/16 Amdt 2\n\nMain Rotor Blade Spindle - Inspection and Replacement - CANCELLED AD/S-76/17 Amdt 1\n\nPilot and Co-Pilot Seats, Support Frames - Inspection AD/S-76/18\n\nMain Rotor Blade - Tip Plate Assembly Retention Bolts - Inspection and AD/S-76/19\n\nPower Plant Mounting Supports - Inspection and Modification AD/S-76/20\n\nMain Gear Box Assembly - Shaft and Spur Pinion Inspection and Retirement AD/S-76/21 Amdt 1\n\nMain Rotor Control Servo Actuators - Inspection for Balance Tube Passage AD/S-76/22\n\nMain Rotor Servo Actuators Internal Leakage Checks - CANCELLED AD/S-76/23\n\nRotor Brake Installation - Modification AD/S-76/24\n\nMLG Positioning Rod and Lower Drag Race Rod End Assemblies AD/S-76/25 Amdt 1\n\nVertical Stabiliser Pylon Leading Edge Skin AD/S-76/26 Amdt 1\n\nMain Rotor Blade Spar Tip End - Inspection AD/S-76/27\n\nUtility Hoist - Inspection AD/S-76/28\n\nVertical Pylon Forward Spar AD/S-76/29 Amdt 4\n\n  \nTail Rotor Blade Elliptical Centering Plug and Retaining Pad AD/S-76/30 Amdt 1\n\nUpper Fuselage Station 215 Bulkhead AD/S-76/31 Amdt 1\n\nTail Rotor Gearbox - Pitch Change Shaft - CANCELLED AD/S-76/32\n\nEngine Containment Kit and Compartment Protection Shield - CANCELLED AD/S-76/33\n\nElectrical Power - Essential Bus Modification AD/S-76/34\n\nTail Rotor Controls Centering Quadrant - Modification AD/S-76/35\n\nFuselage - Engine Compartment Centre Firewall - Inspection of No. 1 Tail Drive AD/S-76/36\n\nEngine Fire Extinguisher Harness - Modification AD/S-76/37\n\nMain Rotor Gear Box No. 1 and No. 2 Input Bevel Pinion Housing Assemblies - AD/S-76/38\n\nMain Rotor Blade Tip Block and Tip End Assemblies - Inspection and AD/S-76/39 Amdt 1\n\nPower Train Tail Drive Shaft Bearing Support Assembly AD/S-76/40\n\nEmergency Flotation System AD/S-76/41\n\nUpper Fuselage, Station 300 AD/S-76/42\n\nTail Rotor Servo Actuator Linkage AD/S-76/43\n\nTail Rotor Blade Disbonding - CANCELLED AD/S-76/44\n\nMain Rotor Servo Actuator Assemblies - CANCELLED AD/S-76/45\n\nElectrical DC Power System AD/S-76/46\n\nEngine and Engine Compartment Drain Lines AD/S-76/47\n\nMain Gearbox Lower Housing Jet Port Liners AD/S-76/48\n\nMain Rotor Servo Actuators - CANCELLED AD/S-76/49\n\nMain Rotor Servo Actuators - CANCELLED AD/S-76/50\n\nMain Rotor Servo Actuator Assemblies - CANCELLED AD/S-76/51 Amdt 1\n\nPower Turbine Speed Trim Control Actuators AD/S-76/52\n\nDoors - Window Frame AD/S-76/53\n\nMain Gearbox Tail Takeoff Flange Locknut AD/S-76/54\n\nRetention Bolt for Stationary Swashplate Expandable Pin AD/S-76/55 Amdt 1\n\nVertical Pylon Forward Spar Cap Angles - CANCELLED AD/S-76/56\n\nNot Issued AD/S-76/57\n\nTail Gearbox Output Shaft AD/S-76/58\n\nTail Rotor Control Rod - Rod Ends AD/S-76/59 Amdt 1\n\nSwashplate Assembly Uniball Bearing Retainer AD/S-76/60\n\nAC Generator Interlock System AD/S-76/61\n\nTail Gearbox Forward Fairing to Pylon Attachment Angle AD/S-76/62\n\nMain Rotor Blade Root and Pocket Separation AD/S-76/63\n\nro Aire Air Conditioning System AD/S-76/64\n\nMain Rotor Shaft AD/S-76/65 Amdt 4\n\n  \nMain Landing Gear Positioning Rod Assembly AD/S-76/66\n\nAttitude and Heading Reference Warning AD/S-76/67\n\nLanding Gear Parts Life Limit AD/S-76/68\n\nMain Rotor Blade Lightning Strike Damage AD/S-76/69\n\nMain Rotor Spindle Attachment Bolt AD/S-76/70\n\nRotor Brake Disc AD/S-76/71\n\nMain Landing Gear Brake Discs - Replacement AD/S-76/72\n\nDual Inverter Wiring AD/S-76/73","sortOrder":0}],"analysis":{"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"},"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 2004. The note explicitly states each AD is being re-made 'in exactly the same form as appears in the latest published edition of the Directive.' This is purely an administrative remaking to ensure legal validity, not an expansion of scope."},"complexity_factors":["Single, clear purpose: revocation and remaking of existing instruments","No defined terms section - relies on external aviation terminology","Simple structure: authorisation clause, two operative paragraphs (revoke and make), schedule table","Cross-references limited to regulation 39.001(1) of CASR 1998 and the attached ADs themselves","Schedule 1 is a straightforward table listing 73 ADs by name and number","No conditional logic or nested exceptions in the instrument itself (complexity exists in the attached ADs, not this remaking instrument)","Short length (approximately 1 page of substantive content)"],"plain_english_summary":"This instrument revokes and reissues 73 existing airworthiness directives for Sikorsky S‑76 helicopters in Australia, effectively remaking them in the same form so they remain legally valid and enforceable. It affects S‑76 owners, operators, maintenance organisations and pilots, preserving mandatory safety requirements and clarifying that some previously cancelled ADs are formally removed as their issues have been resolved."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope is not substantively changed. The delegate revokes and re‑makes the listed ADs in the same form, so the same aircraft, components and compliance obligations continue to be governed; the instrument formalises legal status without altering technical requirements (see Schedule 1 and note)."},"complexity_factors":["Administrative rather than substantive change: revocation and immediate re‑making of instruments in identical form reduces legal complexity.","Large schedule listing many separate ADs increases operational breadth—multiple stakeholders across operators and maintainers are affected.","Technical content of the underlying ADs (inspections, modifications, life limits) requires specialist aviation maintenance knowledge to implement.","Cross‑reference to Civil Aviation Safety Regulations (subreg 39.001(1)) and individual AD documents introduces formal legal links to follow.","Inclusion of entries marked ‘CANCELLED’ adds minor procedural ambiguity about which instruments remain active.","Potential for modest additional compliance/administrative burden from re‑issuing instruments (record‑keeping, citation updates)."],"plain_english_summary":"This instrument revokes a list of Sikorsky S‑76 airworthiness directives and immediately reissues each one as a separate instrument in the same form, preserving the existing mandatory inspection, modification and retirement requirements (subreg 39.001(1); Schedule 1). It primarily affects owners, operators and maintenance organisations of S‑76 helicopters who must continue to comply; CASA’s delegate makes the administrative decision. The change is procedural: it preserves technical obligations while shifting legal formality and any associated record‑keeping or administrative compliance tasks."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-sikorsky-s-76-series-helicopters","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-sikorsky-s-76-series-helicopters/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-sikorsky-s-76-series-helicopters/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-sikorsky-s-76-series-helicopters/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-sikorsky-s-76-series-helicopters/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-sikorsky-s-76-series-helicopters/documents"}}