{"id":"F2006B07946","name":"Airworthiness Directives 2004 - Revocation and Remaking - Pilatus Britten-Norman BN-2 Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-pilatus-britten-norman-bn-2-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51019,"registerId":"commonwealth-F2006B07946-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 - Pilatus Britten-Norman BN-2 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\nPilatus Britten-Norman BN-2 Series Aeroplanes\n\nAD Name AD Number\n\nPilot and Passenger Seat Cushion Supports - Inspection AD/BN-2/1 Amdt 1\n\nFuel Tank Sump - Modification AD/BN-2/2\n\nVacuum Hose - Replacement AD/BN-2/3\n\nPilots Safety Harness - Installation - CANCELLED AD/BN-2/4\n\nRudder Control System - Modification AD/BN-2/5\n\nMain Fuel Pipe - Modification AD/BN-2/6\n\nElevator Trim System - Modification AD/BN-2/7\n\nTurnbuckles in Aileron, Rudder and Nose Wheel Steering Control Systems - AD/BN-2/8\n\nEmpennage - Inspection and Modification AD/BN-2/9 Amdt 4\n\nSuperseded - CANCELLED AD/BN-2/10\n\nElevator Trim Final Drive Lever - Inspection and Modification AD/BN-2/11 Amdt 1\n\nWing Attachment Spindles - Inspection AD/BN-2/12\n\nRudder Bar Beams - Inspection and Modification AD/BN-2/13 Amdt 1\n\nFlap Operating Lever - Modification AD/BN-2/14 Amdt 2\n\nTail Plane Front Spar Attachment - Inspection AD/BN-2/15\n\nCarburettor Air Box - Modification AD/BN-2/16\n\nElevator Trim Jack - Inspection and Modification AD/BN-2/17 Amdt 1\n\nEngine Oil Return Pipes - Modification AD/BN-2/18\n\nEngine Mounting Bracket Jo-Bolts - Inspection and Modification AD/BN-2/19\n\nElevator Outboard Hinge Spacers - CANCELLED AD/BN-2/20\n\nElevator Trim Lever Box Cracking and Loose Rivets AD/BN-2/21 Amdt 1\n\nEmergency Exits Placard AD/BN-2/22\n\nWoodward Propeller Governor Drive Shaft - Inspection and Replacement AD/BN-2/23 Amdt 1\n\nFlap Attachments and Flap Operating Lever - Inspection AD/BN-2/24 Amdt 1\n\nWing Mounted Engine Upper Mounting Brackets AD/BN-2/25 Amdt 3\n\nWing Rear Spar - Inspection AD/BN-2/26\n\nAileron Mass Balance Attachment - Inspection and Modification AD/BN-2/27\n\nFlap Drive Pick-Up Bracket AD/BN-2/28 Amdt 1\n\nLeft and Right Rudder Bar Pillar and Slider Tube Assemblies AD/BN-2/29 Amdt 2\n\n  \nSix Degree Droop Flap Micro-Switch Setting - Inspection AD/BN-2/30\n\nEngine Mounting Frames - Inspection AD/BN-2/31 Amdt 1\n\nPilots Seat Locking Mechanism - Inspection and Modification AD/BN-2/32\n\nRudder Hinge Mounting - Inspection and Modification AD/BN-2/33 Amdt 1\n\nRudder Bar Lower Mounting - Inspection and Modification AD/BN-2/34\n\nAirframe Structural Fatigue Life Limitations AD/BN-2/35 Amdt 2\n\nEngine Mounting Brackets - Inspection AD/BN-2/36\n\nPassenger Seats - Inspection and Modification AD/BN-2/37\n\nFlight Compartment Seat Back - Inspection and Modification AD/BN-2/38\n\nAileron Mass Balance Tube - Inspection AD/BN-2/39\n\nPropeller Governors - Inspection and Adjustment - CANCELLED AD/BN-2/40\n\nElevator and Flap Control Rods - Inspection AD/BN-2/41 Amdt 1\n\nElevator Trim Tab Cracking AD/BN-2/42 Amdt 3\n\nEngine Controls Attachment Brackets - Modification AD/BN-2/43\n\nMain Undercarriage Leg - Conversion AD/BN-2/44\n\nMain Undercarriage Leg AD/BN-2/45 Amdt 1\n\nEngine Control Shaft - Inspection AD/BN-2/46\n\nWing Tip Tank Selector Switches - Modification AD/BN-2/47\n\nWing Tip Tank Fuel Contents Transmitter Floats - Inspection AD/BN-2/48\n\nPilots Seat Backs - Inspection and Modification AD/BN-2/49\n\nTailplane Skin and Structure - Inspection and Rectification AD/BN-2/50\n\nMain Landing Gear Upper Torque Link Attachment Lug AD/BN-2/51 Amdt 3\n\nElevator Mass Balance Weights AD/BN-2/52 Amdt 1\n\nPrimary Structure Corrosion AD/BN-2/53 Amdt 2\n\nPilots Switch Panel AD/BN-2/54\n\nNose Wheel Steering Ring Gear - CANCELLED AD/BN-2/55\n\nElevator Trim Cable AD/BN-2/56\n\nEngine Air Intake Hose AD/BN-2/57 Amdt 2\n\n70 Amp DC Generation System AD/BN-2/58\n\nRudder Control Cables AD/BN-2/59\n\nGenerator Inspection AD/BN-2/60\n\nMain Landing Gear Attachment Bolts AD/BN-2/61 Amdt 1\n\nWing Spar Cap AD/BN-2/62\n\nNacelle Box Structure at Bottom Fitting of MLG AD/BN-2/63\n\nPropeller Anti-Ice System AD/BN-2/64 Amdt 1\n\nNLG Leg Cylinder Bearing Surfaces AD/BN-2/65\n\n  \nNose Wheel - Steering Drive-Ring AD/BN-2/66 Amdt 1\n\nControl Column Sliding Tube AD/BN-2/67 Amdt 1\n\nRudder Lower Hinge Doubler AD/BN-2/68\n\nThrottle Friction Adjuster AD/BN-2/69 Amdt 1\n\nElevator Outboard Hinge Bracket AD/BN-2/70\n\nMain Landing Gear Oleo Attachment Bracket AD/BN-2/71 Amdt 4\n\nWing Access Panel AD/BN-2/72\n\nEmergency Exit Window AD/BN-2/73\n\nEngine Mounting Brackets AD/BN-2/74 Amdt 1\n\nTurbine Engine Mounting Frame NB-20-6853 AD/BN-2/75 Amdt 2\n\nControl Column Universal Joint AD/BN-2/76\n\nAccess Panel Bolts AD/BN-2/77 Amdt 1\n\nControl Rod to Elevator Trim Tab Lever Bolt Retainer AD/BN-2/78\n\nFHL Landing Gear Units AD/BN-2/79\n\nFolding Passenger Seat Rear Frame AD/BN-2/80\n\nControl Cable Swivel Unit Mounting Bracket AD/BN-2/81\n\nElevator Final Drive Rod AD/BN-2/82\n\nHorizontal Stabiliser Attachment Bolts AD/BN-2/83","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument performs exactly the function described in its title — it revokes and remakes Airworthiness Directives for the Pilatus Britten-Norman BN-2 series. The scope has not expanded beyond this specific aircraft type, and the note explicitly states each Directive is being re-made 'in exactly the same form' as previously published. This is pure administrative continuity without scope creep."},"complexity_factors":["Single, clear purpose: revocation and remaking of existing instruments","No substantive legal drafting — the actual technical requirements are contained in attached documents not reproduced here","Simple tabular structure listing 83 items with names and reference numbers","Minimal conditional logic — only straightforward 'revoke and remake' operation","No defined terms section within this instrument itself","Short length (approximately 2 pages of substantive content)","Straightforward cross-references to Schedule 1 and attached documents"],"plain_english_summary":"This CASA safety order revokes and reissues 83 Airworthiness Directives for the Pilatus Britten-Norman BN-2 (Islander/Defender), effectively refreshing their legal status without changing their substance. It’s administrative housekeeping to keep mandatory safety requirements enforceable.\n\nIt affects BN-2 owners, operators, and maintenance organisations in Australia; a small number of older Directives are cancelled. The practical obligations for compliance remain the same — this simply ensures those safety mandates stay current and binding."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument does not change the substantive scope or technical requirements of the ADs. It revokes the listed directives and reissues them in the same form (administrative re‑making). The practical effect is administrative (freshly issued instruments and possible record‑keeping updates) rather than an expansion or redirection of regulatory scope."},"complexity_factors":["Single legal power used: exercise of subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998","Schedule lists ~83 AD entries (AD/BN‑2/1 to AD/BN‑2/83) with amendment notations","Several entries marked CANCELLED or Superseded, requiring attention to status of individual ADs","Note stating ADs are re‑made “in exactly the same form” reduces substantive complexity","Limited conditional logic: instrument simply revokes and remakes (few cross‑references or exceptions)","Potential operational complexity for stakeholders in updating records and citations for many separate instruments"],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- A delegate of the Civil Aviation Safety Authority (CASA) uses the power in subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998 to revoke a list of existing Airworthiness Directives (ADs) and to re‑make each one as a separate instrument. (See clauses (a) and (b) and Schedule 1.)\n- The Schedule lists ADs that apply to Pilatus Britten‑Norman BN‑2 series aeroplanes (AD/BN‑2/1 through AD/BN‑2/83, with some entries marked as cancelled or superseded and many shown with amendment numbers).\n- The instrument states each attached Airworthiness Directive is being re‑made “in exactly the same form as appears in the latest published edition of the Directive.” That indicates no change to the substantive wording or technical requirements of the ADs — this is an administrative reissue.\n\n**Who this affects**\n\n- Aircraft owners and operators of Pilatus Britten‑Norman BN‑2 series aeroplanes — they remain subject to the same inspection, modification and compliance requirements previously set out in the ADs listed in Schedule 1.\n- Maintenance organisations, licensed engineers and parts suppliers who carry out the inspections, replacements or modifications required by those ADs.\n- CASA (the regulator) and its delegate — CASA is the decision‑maker and bears the administrative work of revoking and reissuing the ADs.\n\n**Why it matters**\n\n- Airworthiness Directives impose mandatory safety actions (inspections, replacements, modifications) on particular aircraft types. Re‑issuing them as separate instruments preserves those regulatory obligations and may change how they are referenced legally or administratively.\n- For operators and maintainers the substantive safety obligations do not change (the instrument expressly re‑makes the ADs in the same form). However, the administrative reissue can affect record‑keeping, legal references and how compliance is demonstrated (for example, practitioners will need to cite the newly made instruments rather than the old AD versions).\n\n**Practical mechanics and immediate effects**\n\n- The delegate revokes the listed ADs and simultaneously makes each one again as its own instrument. This action does not introduce new technical requirements, according to the instrument’s note.\n- A small subset of ADs in the Schedule are labelled “CANCELLED” or “Superseded”, which means those specific directives have been removed or replaced and therefore no longer impose obligations.\n- Operators do not face new technical compliance actions, but they must ensure their compliance records and document references track the freshly issued AD instruments.\n\n**Costs, incentives and trade‑offs**\n\n- Who pays: Costs fall on aircraft owners/operators and maintenance providers who must carry out the inspections/modifications required by the ADs. Those costs already existed prior to reissue; this instrument does not increase technical obligations.\n- Administrative cost: There is a small one‑off administrative cost to CASA to revoke and reissue, and to operators/maintenance organisations to update records, manuals and references to the ADs.\n- Incentives and behaviour: Because the technical content is unchanged, the main behavioural consequence is administrative — operators will update citations and ensure continuing compliance with the reissued instruments. There is no direct change to private‑sector prices, competition or ownership rights from the substantive content of the ADs.\n- Concentration of benefits/costs: Safety benefits from compliance (reduced risk of component failure) accrue broadly to operators, passengers and the public; costs are concentrated on BN‑2 operators and maintainers.\n\n**Implementation risks and rights of decision**\n\n- The delegate (identified in the instrument) has the legal authority to revoke and remake ADs under the cited CASR subregulation, so the action is an exercise of existing regulatory power.\n- Implementation risk is low for technical compliance because the wording and requirements remain the same, but there is a modest risk of confusion if stakeholders do not update their records to reference the newly made instruments.\n\n**Where to look in the instrument for specifics**\n\n- Legal basis and action: subregulation 39.001(1) and clauses (a) and (b).\n- The full list of affected ADs and notes about cancellations/supersessions: Schedule 1.\n- Confirmation that wording is unchanged: the instrument’s Note that each AD is re‑made in exactly the same form as the latest published edition.\n\nOverall, this instrument is an administrative revocation and re‑making of a package of ADs applicable to Pilatus Britten‑Norman BN‑2 aeroplanes; it preserves existing technical obligations while producing freshly issued legal instruments that operators and maintainers must reference for ongoing compliance."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pilatus-britten-norman-bn-2-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pilatus-britten-norman-bn-2-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pilatus-britten-norman-bn-2-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pilatus-britten-norman-bn-2-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pilatus-britten-norman-bn-2-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-pilatus-britten-norman-bn-2-series-aeroplanes/documents"}}