{"id":"F2006B07850","name":"Airworthiness Directives 2004 - Revocation and Remaking - Embraer EMB-120 (Brasilia) Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-embraer-emb-120-brasilia-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50804,"registerId":"commonwealth-F2006B07850-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 - Embraer EMB-120 (Brasilia) 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\nEmbraer EMB-120 (Brasilia) Series Aeroplanes\n\nAD Name AD Number\n\nGenerator Control Unit (GCU) AD/EMB-120/1\n\nAPU Electronic Control Unit AD/EMB-120/2\n\nAutopilot Disengagement Logic AD/EMB-120/3 Amdt 1\n\nTable Stowage AD/EMB-120/4\n\nEscape Hatch Marking AD/EMB-120/5 Amdt 1\n\nFire Protection Engine Fire Detector Sensor Element AD/EMB-120/6\n\nFlight Idle Stop System AD/EMB-120/7 Amdt 1\n\nElectrical Power Wiring AD/EMB-120/8\n\nEmergency Lighting AD/EMB-120/9\n\nElectrical Power System Emergency Bus - CANCELLED AD/EMB-120/10 Amdt 3\n\nAHRS Power Interruption AD/EMB-120/11 Amdt 1\n\nAileron Upper Channel Fairings AD/EMB-120/12 Amdt 1\n\nWing Rib to Skin Fitting Angles AD/EMB-120/13 Amdt 1\n\nFuselage Aft Section Drain AD/EMB-120/14\n\nPropeller Ground Operation - Limitations AD/EMB-120/15 Amdt 1\n\nElectrical Power System - CANCELLED AD/EMB-120/16\n\nLanding Gear - Door Blockage AD/EMB-120/17 Amdt 1\n\nCombustion Chamber Rear Drain Valve - CANCELLED AD/EMB-120/18\n\nIce Detector System AD/EMB-120/19 Amdt 1\n\nFlight Data Recorder Coupler Screws AD/EMB-120/20\n\nElevator Pitch Trim System AD/EMB-120/21\n\nWing and Empennage Leading Edge AD/EMB-120/22\n\nReplacement of Pitot Heater Power Wire AD/EMB-120/23\n\nAileron Mass Balance Weights AD/EMB-120/24\n\nNacelle Structure AD/EMB-120/25 Amdt 1\n\nWing-to-Fuselage Fittings AD/EMB-120/26\n\nIcing Conditions AD/EMB-120/27 Amdt 3\n\nElectrical Wiring Overheat AD/EMB-120/28 Amdt 1\n\nElevator Trim System AD/EMB-120/29 Amdt 2\n\n  \nAileron and Elevator Rotary Variable Inductive Transducer Bellcrank Inspection AD/EMB-120/30\n\nFlight Attendant Oxygen AD/EMB-120/31 Amdt 2\n\nElectrical Power System AD/EMB-120/32\n\nAileron and Elevator Rotary Variable Inductive Transducer Bellcrank Assemblies AD/EMB-120/33\n\nFuelling Control Panel Access Door AD/EMB-120/34\n\nMain Wheel Hubcap AD/EMB-120/35\n\nRotating Beacon Electrical Bonding AD/EMB-120/36","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument is administrative: it revokes listed ADs and re-makes them \"in exactly the same form as\" the latest published editions. It does not expand or reduce substantive obligations except for the specific entries marked 'CANCELLED' (which remove those AD obligations). Therefore the overall regulatory scope and technical requirements have not been changed beyond republication and cancellation of specific items."},"complexity_factors":["Short instrument with a single statutory action (revocation and re-making) under subregulation 39.001(1)","Schedule lists 36 AD items for the Embraer EMB-120 family","Multiple entries show amendment numbers (Amdt 1–3), requiring users to track the latest amended edition","Several entries are explicitly marked 'CANCELLED', requiring attention to which instruments remain obligatory","Relies on the content of attached ADs (external documents) which must be consulted individually to see the detailed technical requirements","Administrative complexity arises from re-issuing each AD as a separate instrument (document tracking, record updates), but there are no substantive cross-cutting changes or new conditions introduced"],"plain_english_summary":"**What this instrument does (mechanically)\n\n- The Civil Aviation Safety Authority (CASA), by a delegate (David Villiers), formally revokes a list of existing Airworthiness Directives (ADs) that apply to Embraer EMB-120 (Brasilia) aeroplanes and re-issues (re-makes) each revoked AD as a separate legal instrument.  The power used is subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998.\n\n- The Schedule lists the affected ADs by name and reference number (for example AD/EMB-120/1 Generator Control Unit). Some listed items are marked as \"Amdt\" with an amendment number (showing the latest amended version being re-made). A few entries are marked \"CANCELLED\" (those directives are being cancelled and not re-made).\n\n- The instrument states explicitly that each attached AD is being re-made \"in exactly the same form as appears in the latest published edition of the Directive.\" In other words, this instrument does not change the substance of the ADs — it is an administrative revocation and republication exercise.\n\nWho is affected\n\n- Owners and operators of Embraer EMB-120 (Brasilia) series aircraft registered in Australia.\n- Maintenance organisations, licensed aircraft engineers and other parties obliged to comply with ADs (for example, continuing airworthiness managers and Australian air operators).\n- CASA (administration and enforcement) and anyone who keeps regulatory compliance records for the affected aeroplanes.\n\nWhy it matters (practical effects and who pays)\n\n- Airworthiness Directives are mandatory safety requirements. Operators must comply with the actions and inspection regimes set out in each AD (repairs, inspections, modifications, operational limitations). Compliance can require labour, parts, downtime for the aircraft, and record-keeping costs. Those costs are borne by the aircraft owner/operator.\n\n- Re-making the ADs as separate instruments does not change what operators must do (the content is unchanged), but it may require administrative updates in operator compliance systems: recording the new instrument references, attaching the re-made documents to maintenance records, and confirming which ADs have been cancelled.\n\n- The entries marked \"CANCELLED\" indicate that those particular ADs are being removed and therefore no longer impose obligations.\n\nOfficial rationale and practical testing of that rationale\n\n- The instrument itself states the purpose: to revoke and re-make listed ADs so each appears as a separate, current instrument (administrative housekeeping). This is an explicit claim in the note and the Schedule.\n\n- Costs and incentives: because content is unchanged, the primary costs are administrative (time to update records and ensure traceability). If any operator had relied on old document references in contracts or maintenance systems, there is a small switching cost to update references. The substantive safety and operational obligations remain the same, so there is no change in long‑term operational costs or technical requirements.\n\n- Implementation risks and trade-offs: the main risk is potential short-term confusion during the transition (for example, if an operator's compliance system still cites an old AD number). CASA will need to ensure the re-made instruments are readily available and clearly linked to the cancelled versions. There is limited bureaucratic discretion here: the delegate used a statutory power to re-issue identical instruments, so there is little scope for substantive change within this instrument itself.\n\n- Effects on private choice and markets: because the content is unchanged, the instrument does not alter firms' substantive contractual freedom, market entry or competitive conditions. It imposes no new technical obligations that would reshape business models; it only affects administrative compliance tracking.\n\nConcrete mechanics operators should note\n\n- Check whether any AD your operation follows appears in the Schedule.\n- Note the AD reference numbers, amendment numbers (Amdt), and any marked \"CANCELLED.\"\n- Replace or supplement your maintenance and compliance records with the re-made instruments (identical content but new instrument form/reference).\n- If in doubt about compliance status, consult CASA or the attached text of each re-made AD for exact requirements.\n\nBottom line: This instrument is an administrative revocation and republication of a set of ADs for the Embraer EMB-120 family. It does not change the technical or operational requirements of those ADs; it mainly affects how the ADs are presented and tracked as legal instruments, and imposes modest administrative updating costs on operators and maintainers."},"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":"The instrument explicitly states it is re-making the directives \"in exactly the same form as appears in the latest published edition.\" This is a pure administrative consolidation with no expansion of scope."},"complexity_factors":["Single, clear purpose: revocation and remaking of existing instruments","No substantive legal drafting — relies entirely on attached schedules not reproduced in full","Only 1 defined term implicitly used (the Schedule reference)","No conditional logic or nested exceptions in the operative provisions","Straightforward administrative mechanism under a single regulation (subregulation 39.001(1))","Tabular format in Schedule 1 makes the list of affected directives readable","Note clarifies that content is unchanged, reducing interpretive burden"],"plain_english_summary":"This instrument revokes and re-makes 36 airworthiness directives for Embraer EMB-120 (Brasilia) aircraft in Australia, keeping existing safety orders legally current and enforceable rather than letting them lapse. It preserves the same requirements as before to ensure ongoing inspections, repairs, and modifications for unsafe conditions.\n\nIt affects EMB-120 owners/operators, maintenance organisations, and CASA, and keeps directives covering engines, wiring, flight controls, landing gear, fire protection and ice detection in force; a few directives are formally cancelled."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-embraer-emb-120-brasilia-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-embraer-emb-120-brasilia-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-embraer-emb-120-brasilia-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-embraer-emb-120-brasilia-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-embraer-emb-120-brasilia-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-embraer-emb-120-brasilia-series-aeroplanes/documents"}}