{"id":"F2006B07779","name":"Airworthiness Directives 2004 - Revocation and Remaking - British Aerospace BAe 146 Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-british-aerospace-bae-146-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50574,"registerId":"commonwealth-F2006B07779-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 - British Aerospace BAe 146 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\nBritish Aerospace BAe 146 Series Aeroplanes\n\nAD Name AD Number\n\nFuselage Skin - Inspection and Modification AD/BAe 146/1\n\nAir Cruisers Evacuation Slide AD/BAe 146/2\n\nEvacuation Slide Cover Assembly Latch Tension AD/BAe 146/3\n\nFlight Controls - Stall Identification AD/BAe 146/4 Amdt 1\n\nMLG Shock Absorber - Lower Attachment Pin - CANCELLED AD/BAe 146/5\n\nWing to Fuselage Fairing Skin Chafe - CANCELLED AD/BAe 146/6\n\nRear Fuselage Lap Joints - Redux Bonding AD/BAe 146/7 Amdt 1\n\nFlaptrack 3 Lower Carriage Roller Bearings AD/BAe 146/8 Amdt 1\n\nSteering Ring Cuff Nut AD/BAe 146/9 Amdt 1\n\nOxygen Main Supply Cylinder Corrosion AD/BAe 146/10\n\nMain Landing Gear - Main Fitting AD/BAe 146/11\n\nElevator \\`G Weight Damper AD/BAe 146/12 Amdt 1\n\nAdditional Elevator Mass Balance AD/BAe 146/13\n\nElectric Flap Control Unit AD/BAe 146/14\n\nAdditional Riveted Attachment - Stringer 21P AD/BAe 146/15 Amdt 1\n\nRear Spar Root Joint Attach Fittings Wing Rib 2 AD/BAe 146/16 Amdt 5\n\nElevator Cable Chafe - Frames 42 to 44 - CANCELLED AD/BAe 146/17\n\nPylon to Engine Front Mount Yoke Bush AD/BAe 146/18\n\nAir Cruisers Evacuation Slide/Slide Raft AD/BAe 146/19\n\nAvionics Rack Earth Stud AD/BAe 146/20\n\nRemote Controlled Circuit Breaker AD/BAe 146/21\n\nStall Ident and Warning AD/BAe 146/22\n\nIDG Generator In-Line Splices - CANCELLED AD/BAe 146/23 Amdt 2\n\nAPU Generator In-Line Splices - CANCELLED AD/BAe 146/24 Amdt 2\n\nFreight Door Torque Shaft AD/BAe 146/25\n\nParking Brake AD/BAe 146/26\n\nPassenger and Service Door Mechanism AD/BAe 146/27 Amdt 1\n\nMain Landing Gear Lock Jack AD/BAe 146/28\n\nSeat Rail Bolts AD/BAe 146/29\n\n  \nLower Wing Skin AD/BAe 146/30\n\nNose Cowl Extinguisher Pipe AD/BAe 146/31\n\nCentre Section Fuel Tank Coating AD/BAe 146/32\n\nPitot-Static System AD/BAe 146/33\n\nAnti-Skid Control System AD/BAe 146/34\n\nMLG Door Hinge Bracket AD/BAe 146/35 Amdt 1\n\nWing to Fuselage Fairings AD/BAe 146/36\n\nLanding Gear AD/BAe 146/37\n\nGenerator Control Unit (GCU) Replacement AD/BAe 146/38\n\nAPU Power Supplies AD/BAe 146/39\n\nNose Landing Gear Upper Main Fitting AD/BAe 146/40 Amdt 2\n\nCall Panel Mountings AD/BAe 146/41\n\nWing Centre Section Top Skin AD/BAe 146/42\n\nN2 Limitations for Anti-Ice Selection - Placard AD/BAe 146/43\n\nEvacuation Slide AD/BAe 146/44 Amdt 1\n\nAirbrake Feedback Spring AD/BAe 146/45\n\nGenerator Control Unit AD/BAe 146/46 Amdt 1\n\nWindshear Detection and Recovery System AD/BAe 146/47\n\nLift Spoiler Jack AD/BAe 146/48\n\nEngine Driven Pump Case Drain Coupling AD/BAe 146/49\n\nGenerator Control Unit AD/BAe 146/50\n\nElectrical Power Dual Lead Acid Battery Installation AD/BAe 146/51\n\nFuselage Frame 29 AD/BAe 146/52 Amdt 1\n\nAPU Bay Forward Firewall AD/BAe 146/53 Amdt 3\n\nElevator Drain Holes AD/BAe 146/54\n\nLift Spoilers Warning Light AD/BAe 146/55\n\nAileron Servo and Trim Tab Drive Brackets AD/BAe 146/56\n\nMLG Direction Link Sub-Assembly AD/BAe 146/57\n\nLanding Gear Brake Unit AD/BAe 146/58\n\nElevator Mass Balance Weight AD/BAe 146/59\n\nGenerator Feeder Cables AD/BAe 146/60\n\nTop Skin Stress Corrosion Cracking AD/BAe 146/61 Amdt 2\n\nFire Protection Freight Compartment - CANCELLED AD/BAe 146/62\n\nPitot-Static System - True Airspeed Computer No.1 AD/BAe 146/63\n\nPitot-Static System - True Airspeed Computer No.2 AD/BAe 146/64\n\nMain Landing Gear Sidestay Outer Link AD/BAe 146/65 Amdt 1\n\n  \nWing Top Skin Panels AD/BAe 146/66 Amdt 2\n\nHorizontal Stabiliser to Vertical Stabiliser Attachment Brackets AD/BAe 146/67\n\nEye Bolt and Piston Rod Threads of MLG Retraction Actuator AD/BAe 146/68\n\nAltitude Icing Limitations and Ice Protection Placards - CANCELLED AD/BAe 146/69\n\nSkin Inspection at Frame 29 between Stringers 12 and 13 AD/BAe 146/70\n\nNLG Retraction Jack Attachment Boss AD/BAe 146/71 Amdt 2\n\nFire Protection and Smoke Detection - Freight Compartment AD/BAe 146/72\n\nMLG Door Lock and MLG Uplock AD/BAe 146/73\n\nPowerplant Firewire Responder Units AD/BAe 146/74\n\nRemoval of Altitude Limitation in Icing Conditions AD/BAe 146/75\n\nJo-Bolts and Crown Fittings at Wing Rib 0 and Rib 2 LH & RH AD/BAe 146/76 Amdt 2\n\nPylon to Wing Forward Attachment Bolts AD/BAe 146/77 Amdt 3\n\nHella Passenger Service Units AD/BAe 146/78\n\nNose Landing Gear Oleo AD/BAe 146/79\n\nMain Landing Gear Sidestay AD/BAe 146/80\n\nPacific Scientific Fire Bottle Wiring AD/BAe 146/81\n\nRib 2 Lower Wing Skin Joint AD/BAe 146/82\n\nFuselage Underhead Radiused Rivets AD/BAe 146/83\n\nRear Pressure Bulkhead Horizontal Butt Joint AD/BAe 146/84\n\nEnvironmental Control System Component Compatibility - CANCELLED AD/BAe 146/85 Amdt 1\n\nEnvironmental Control System Inspection for Contamination AD/BAe 146/86\n\nPitot Static System AD/BAe 146/87\n\nEngine Start Electrical Circuit AD/BAe 146/88 Amdt 2\n\nVickers Standby Generator AD/BAe 146/89\n\nTCAS and GPWS Aural Warning AD/BAe 146/90\n\nFlap Structure and Machined Ribs AD/BAe 146/91 Amdt 2\n\nCentre and Rear Fuselage Skin AD/BAe 146/92\n\nMain Landing Gear Side Stay Inner Link Safe Life AD/BAe 146/93\n\nFuselage Skin Chafing AD/BAe 146/94\n\nCeramic Terminal Blocks AD/BAe 146/95 Amdt 2\n\nWebs/Flanges of Frames 15, 18, 41, and 43 AD/BAe 146/96\n\nNose Landing Gear - Differential Box Collar Cap Screw Torque Reinstatement AD/BAe 146/97\n\nEnvironmental Control System - Component Inspection AD/BAe 146/98\n\nElevator Surface Flight Damper AD/BAe 146/99 Amdt 1\n\nFire Extinguisher Wiring AD/BAe 146/100\n\nDigital Flight Guidance Computer AD/BAe 146/101 Amdt 1\n\n  \nAir-conditioning Duct - Inspection AD/BAe 146/102\n\nFuel Quantity Indication Wiring AD/BAe 146/103\n\nAPU and IDG In-Line Splices AD/BAe 146/104 Amdt 1\n\nAPU - Air Inlet Duct - Modification AD/BAe 146/105\n\nElevator 'G' Weight Support Structure AD/BAe 146/106\n\nForward Fuselage Skin AD/BAe 146/107 Amdt 1\n\nAileron Servo and Trim Tab Drive Brackets AD/BAe 146/108\n\nThales Avionics Distance Bearing Indicator AD/BAe 146/109\n\nPressure Floor Over Main Landing Gear Bay AD/BAe 146/110\n\nAPU - Insulation Blankets & Exhaust Drain Blank AD/BAe 146/111 Amdt 1\n\nCargo Restraint Strap Assemblies AD/BAe 146/112","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument performs exactly the function described in its title—revocation and remaking of existing Airworthiness Directives. There is no scope creep; the 112 directives listed match the stated purpose for BAe 146 series aircraft, and the instrument explicitly notes that each directive is being remade in identical form without substantive change."},"complexity_factors":["Single operative provision with straightforward binary structure (revoke and remake)","No defined terms section—relies entirely on external Civil Aviation Safety Regulations 1998","No conditional logic or nested exceptions in the instrument itself","Complexity derives from volume (112 attached directives) rather than legislative drafting complexity","Cross-reference only to subregulation 39.001(1) of CASR 1998—minimal external dependency","Schedule 1 is a simple tabular list without operative legal text"],"plain_english_summary":"This instrument performs housekeeping for the BAe 146 fleet by revoking and reissuing 112 Airworthiness Directives for the type in their original form, keeping existing, legally binding maintenance and safety obligations enforceable in Australia.  \n\nIt introduces no new technical requirements—only preserves current inspection, repair and modification mandates for operators, maintenance organisations, owners and lessors, while permanently removing a small number of obsolete directives."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument does not change the substantive scope or technical requirements of the listed Airworthiness Directives. It is an administrative revocation and re-issuance in identical form (the instrument states each re-made AD matches the latest published edition). Therefore the regulatory scope and the compliance obligations imposed by the ADs remain unchanged; the instrument only alters the legal packaging and record-keeping of those ADs."},"complexity_factors":["Single operative clause performing two linked administrative acts (revoke and re-make)","Schedule listing a large number of ADs (AD/BAe 146/1 through AD/BAe 146/112)","Several entries in the Schedule carry status flags (e.g. \"Amdt 1\", \"Amdt 2\", \"Amdt 3\", or \"CANCELLED\") which increase tracking effort","Reference to an external enabling provision: subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998","Dependence on attached re-made ADs and the externally published latest editions for substantive content (external cross-dependency)"],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- The Civil Aviation Safety Authority (CASA) delegate revokes a set of existing Airworthiness Directives (ADs) that apply to the British Aerospace BAe 146 series aeroplanes (those AD identifiers are listed in Schedule 1).  \n- The instrument then re-issues (\"re-makes\") each of those ADs as separate, stand‑alone instruments that are attached to this revocation notice.  \n- The note in the instrument says each re-made AD is in exactly the same form as the latest published edition of that Directive.  \n\n**Who is affected**\n\n- Aircraft operators, owners and maintenance organisations who operate or service BAe 146 series aeroplanes: they are the parties that must comply with the content of the listed ADs.  \n- CASA and its delegated officers: they carry out the administrative act of revoking and re-issuing the ADs and maintain the legal record.  \n- Any third parties that rely on AD citations in contracts, maintenance records or regulatory filings (for example, insurers, lessors, and maintenance providers).  \n\n**Why it matters (stated purpose and practical effect)**\n\n- The stated purpose (in the instrument) is administrative: to revoke previously issued ADs and re-make each one as a separate instrument, in the same form as the version already published. Re-making preserves the content while changing the legal vehicle by which each AD is recorded.  \n\n- Practical effects: the substantive technical requirements in each AD are not changed by this instrument (the instrument says the re-made ADs are identical to the published versions). What changes is the legal form and possibly the citation for each AD. Operators’ technical compliance obligations remain the same (they still must follow the ADs attached after this instrument).  \n\n**Costs, incentives, trade-offs and implementation risks**\n\n- Direct compliance costs for operators: none material beyond the ADs’ existing inspection/repair costs, because the content of the ADs is unchanged (Schedule 1 and the instrument note).  \n- Administrative costs: CASA and possibly operators or maintenance organisations may need to update records, references, maintenance-control systems, and contractual citations to reflect the re-made AD instruments and any new instrument identifiers. That is a modest one‑off paperwork/recording cost.  \n- Legal and operational risk: there is a small risk of temporary confusion where different documents or older records cite the pre-existing AD instruments. If those older instruments are revoked, users must ensure they rely on the newly‑made attached ADs. That can affect maintenance logs, audit trails, or contractual compliance unless the transition is tracked.  \n- Implementation discretion and opportunity cost: the delegate exercised regulatory administrative power under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998; this is an administrative restructuring of how the ADs are published, not a change in technical policy. The opportunity cost is CASA staff time spent on administrative republishing rather than other regulatory tasks.  \n- Effects on private choice and markets: none direct to product markets, competition, ownership or pricing of air services — the technical obligations remain unchanged and therefore do not alter operators’ ongoing operational choices beyond record-keeping.  \n\n**Who pays and who decides**\n\n- Who pays: operators and maintainers bear the costs of complying with the substantive AD requirements (unchanged). CASA bears the administrative cost of revocation/re-issuance and updating public records.  \n- Who decides: a CASA delegate acting under subregulation 39.001(1) makes the revocation and re‑making decision.  \n\n**Concrete substitution and capture observations**\n\n- Concentrated benefits: none newly created by this instrument; the AD content remains the same.  \n- Diffuse costs: potential small administrative burden spread across many operators/maintenance organisations to update internal records.  \n- Capture or rent-seeking risk: not identified in the instrument — it is an administrative republishing exercise rather than a policy change that would create new regulated advantages.  \n\n**Short conclusion (mechanical summary)**\n\nThis instrument is an administrative action that revokes a list of BAe 146 Airworthiness Directives and re-issues each one as a separate instrument in the same form as already published. It does not alter the substance of any listed AD, but it may require modest record-keeping updates by CASA and the aeroplane operators/maintenance organisations that rely on those ADs."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-british-aerospace-bae-146-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-british-aerospace-bae-146-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-british-aerospace-bae-146-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-british-aerospace-bae-146-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-british-aerospace-bae-146-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-british-aerospace-bae-146-series-aeroplanes/documents"}}