{"id":"F2006B07808","name":"Airworthiness Directives 2004 - Revocation and Remaking - Cessna 500 (Citation) Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-cessna-500-citation-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50669,"registerId":"commonwealth-F2006B07808-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 - Cessna 500 (Citation) 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\nCessna 500 (Citation) Series Aeroplanes\n\nAD Name AD Number\n\nWing Cover Plate Screws - Replacement AD/CESSNA 500/1\n\nCentre Flap Aft Bearing - Modification AD/CESSNA 500/2\n\nElevator Torque Tube Assembly - Inspection and Replacement AD/CESSNA 500/3\n\nFlight Compartment Side Windows - Inspection and Replacement AD/CESSNA 500/4 Amdt 1\n\nLanding Gear - Structural Life Limitation AD/CESSNA 500/5 Amdt 1\n\nOxygen Mask Door Actuating Piston - Replacement AD/CESSNA 500/6\n\nLanding Gear Unlock Actuator and Control System AD/CESSNA 500/7\n\nStatic System Drainage - Inspection AD/CESSNA 500/8\n\nStatic Port - Modification AD/CESSNA 500/9 Amdt 1\n\nThrottle Control Lock - Modification AD/CESSNA 500/10\n\nAft Facing Seat - Inspection AD/CESSNA 500/11\n\nGlideslope Interlock - Modification AD/CESSNA 500/12\n\nPre-Certification Requirements - Modifications AD/CESSNA 500/13\n\nExhaust Nozzle Cone - Replacement AD/CESSNA 500/14\n\nWing Main Spar - Inspection and Modification AD/CESSNA 500/15\n\nCabin Door Frame - Inspection, Modification and Replacement AD/CESSNA 500/16 Amdt\n\nElevator Sector Bracket Attach Rivets - Inspection AD/CESSNA 500/17\n\nMain Gear Actuator to Strut Attach Stud - Inspection AD/CESSNA 500/18\n\nElevator and Rudder Trim System - Inspection AD/CESSNA 500/19\n\nTailcone Skin and Vertical Fin Spar Interference AD/CESSNA 500/20 Amdt\n\nNitrogen Bottle Installation - Inspection AD/CESSNA 500/21\n\nBrake Shuttle Valve AD/CESSNA 500/22\n\nFreon Air-Conditioner/Elevator Control Cable - CANCELLED AD/CESSNA 500/23\n\nDrag Chute AD/CESSNA 500/24\n\nThrust Reverser Throttle Load Limiter AD/CESSNA 500/25\n\nOutflow Safety Valve AD/CESSNA 500/26\n\nAircraft Flight Manual, Flight into Icing Conditions AD/CESSNA 500/27 Amdt\n\nBFGoodrich Brake Stator Discs AD/CESSNA 500/28","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument does not broaden or narrow the substantive regulatory obligations on operators; it revokes and re‑issues the same ADs in identical form (see Note). The scope remains the same as the original ADs: it is administrative housekeeping to produce separate, current AD instruments rather than a change of substantive scope."},"complexity_factors":["Single, short instrument with a single statutory power cited (subregulation 39.001(1))","Primary action is administrative: revoke and reissue identical instruments","Schedule lists 28 ADs (numbered items), including some marked as amended or cancelled","No complex conditional logic or new defined terms introduced","Relies on external attached AD documents for substantive technical detail (cross‑referencing to separate instruments)"],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- The Civil Aviation Safety Authority (CASA) delegate cancels (revokes) a group of existing Airworthiness Directives (ADs) for Cessna 500 (Citation) series aeroplanes and issues each of those ADs again as separate legal instruments. This is done under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998 (see main text).\n- The schedule attached to the instrument lists the affected ADs by name and AD number (for example, AD/CESSNA 500/1 – Wing Cover Plate Screws – Replacement, through to AD/CESSNA 500/28 – BFGoodrich Brake Stator Discs).\n- The instrument states that each re‑made AD is identical in content to the latest published edition of that AD (see the Note in the instrument).\n\n**Who this affects**\n\n- Aircraft owners/operators and holders of Cessna 500 (Citation) series aeroplanes registered in Australia.\n- Maintenance organisations and licensed aircraft maintenance engineers who must carry out inspections, modifications or replacements required by the listed ADs.\n- CASA as the regulator, because it administers and publishes the ADs.\n\n**Why it matters**\n\n- Airworthiness Directives are legally enforceable requirements that mandate specific inspections, modifications, replacements, or operational limitations to correct identified safety defects. Compliance costs (inspection labour, parts, downtime) are borne by aircraft owners/operators or their maintenance providers (see Schedule 1 items for the types of work involved).\n- This instrument does not change the technical content of the listed ADs; it revokes the existing instruments and re‑issues them in the same form. That means the substantive safety requirements and associated compliance obligations remain as they were in the latest published ADs.\n\n**Stated purpose and an operational test of that purpose**\n\n- Stated/implicit purpose: administrative housekeeping — to revoke older instrument references and reissue each AD as a separate, current instrument (the instrument explicitly records the re‑made ADs are identical to the latest published editions).\n\n- Test against costs, incentives and trade‑offs:\n  - Compliance costs: unchanged from the existing ADs. Operators still pay for the inspections, modifications or parts required by each AD (Schedule 1 shows the range of mandated tasks such as structural inspections, replacement of parts, modifications, etc.).\n  - Incentives: no substantive change in operator incentives to comply; failure to comply would still carry regulatory risk because the substantive AD content remains in force.\n  - Opportunity cost and productivity: any costs are the same as before; reissuing the ADs should not create new technical requirements that change aircraft availability beyond existing AD obligations.\n  - Bureaucratic discretion: the delegate acts under a specific regulation (subregulation 39.001(1)). Because the substantive text is unchanged, there is limited new discretionary decision‑making introduced by this instrument itself.\n  - Implementation risk and compliance burden: practical risks are administrative — operators and maintenance organisations need to be aware of the new instrument references and ensure their records, logbooks and compliance tracking refer to the current AD instruments. If communication is poor, there is a small risk of confusion about which instrument version is authoritative.\n\n**Effects on private enterprise and markets**\n\n- MROs (maintenance, repair and overhaul businesses) and parts suppliers: work generated by the ADs continues as before; they continue to perform inspections/modifications and supply parts. No new market restrictions, price controls or ownership changes arise from this instrument.\n- Competition and contract freedom: unchanged. Independent maintenance providers remain able to perform the required work subject to normal licensing and certification rules.\n\n**Who pays, who decides, and what behaviour changes**\n\n- Who pays: aircraft owners/operators pay for compliance (inspections, parts, labour, aircraft downtime).\n- Who decides: CASA (through its delegate) issues and republishes the ADs under the cited regulation; operators decide how and when to schedule compliance within the times allowed by each AD.\n- Behaviour changes: none in substance — the same maintenance actions required by the listed ADs continue. The only behavioural change likely is administrative: operators and maintainers should update their reference copies and records to cite the re‑made AD instruments.\n\n**Other notes drawn from the instrument**\n\n- The Schedule includes 28 AD entries, some of which are labelled as amendments (Amdt) and one listed as CANCELLED (AD/CESSNA 500/23 – Freon Air‑Conditioner/Elevator Control Cable).\n- Because the text of the re‑made ADs is stated to be identical to the latest published editions, this instrument functions as an administrative refresh rather than a policy or technical change to airworthiness obligations."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument performs a pure administrative consolidation. The scope remains exactly as intended — to maintain existing safety requirements for Cessna 500 series aircraft while improving the legal architecture. The note explicitly states each directive is \"re-made in exactly the same form,\" confirming no expansion of regulatory burden or subject matter."},"complexity_factors":["Single, clear operative clause with two straightforward actions (revocation and remaking)","No defined terms section — relies on external regulations (Civil Aviation Safety Regulations 1998) for authority","Schedule 1 is a simple table listing 28 directives by name and number only","No conditional logic, exceptions, or nested provisions","Cross-reference limited to one subregulation (39.001(1)) and the attached schedules","Note clarifies that content remains unchanged — no substantive interpretation required","One directive marked \"CANCELLED\" (AD/CESSNA 500/23) indicating prior administrative action"],"plain_english_summary":"This instrument revokes and immediately remakes 28 Airworthiness Directives for Cessna 500-series (Citation) business jets, issuing each as a separate, new legal instrument while keeping their content identical. \n\nIt’s a legal housekeeping move that affects owners, operators, maintenance organisations, and CASA enforcement—preserving the same binding safety obligations but making each directive easier to find, update, and enforce individually."},"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-cessna-500-citation-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-cessna-500-citation-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-cessna-500-citation-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-cessna-500-citation-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-cessna-500-citation-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-cessna-500-citation-series-aeroplanes/documents"}}