{"id":"F2006B07879","name":"Airworthiness Directives 2004 - Revocation and Remaking - Gates Learjet 35 and 36 Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-gates-learjet-35-and-36-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50872,"registerId":"commonwealth-F2006B07879-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 - Gates Learjet 35 and 36 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\nGates Learjet 35 and 36 Series Aeroplanes\n\nAD Name AD Number\n\nPrimary Control System Stop Bolts - Inspection and Replacement AD/LEARJET 35/1\n\nSpoiler Centre Hinge Brackets - Inspection AD/LEARJET 35/2\n\nLower Cabin Door Jambs - Inspection AD/LEARJET 35/3\n\nUpper Wing Skin Fasteners - Inspection AD/LEARJET 35/4\n\nAngle of Attack Indicator - Modification AD/LEARJET 35/5\n\nWing to Fuselage Attachment - Modification AD/LEARJET 35/6\n\nSpoileron Computer - Modification AD/LEARJET 35/7\n\nRefrigeration System Condenser Fan - Inspection and Replacement AD/LEARJET 35/8\n\nSecondary Yaw Damper Servo Cable Clamp Bolt - Inspection AD/LEARJET 35/9\n\nCabin Altitude Pressure Limiter - Installation AD/LEARJET 35/10\n\nElevator Control System - Modification AD/LEARJET 35/11\n\nUpper Cabin Door Locking Mechanism - Modification AD/LEARJET 35/12\n\nUpper Cabin Door Lock Mechanism Bolts - Modification AD/LEARJET 35/13\n\nTailcone Service Area - Inspection AD/LEARJET 35/14 Amdt 1\n\nAutomatic Flight Control Systems - Inspection and Modification AD/LEARJET 35/15\n\nMaximum Operating Airspeed (VMO) - Reduction and Terminating Modification AD/LEARJET 35/16\n\nCabin Interior Liner in Areas of Emergency Exit Door - Inspection AD/LEARJET 35/17\n\nHorizontal Stabiliser Hinge Pin Bushing Installation - Inspection AD/LEARJET 35/18\n\nStall Warning Accelerometer AD/LEARJET 35/19 Amdt 1\n\nEngine Firewall Sealing AD/LEARJET 35/20\n\nEngine Hydraulic Line Interference - Inspection AD/LEARJET 35/21 Amdt 1\n\nAileron Trim Tab Balance Weight - Replacement AD/LEARJET 35/22\n\nFlap System and Flap Sector Mounting Brackets AD/LEARJET 35/23 Amdt 2\n\nBattery Vent System AD/LEARJET 35/24 Amdt 2\n\nFlap Attachment Fittings AD/LEARJET 35/25\n\nForward Engine Mounts AD/LEARJET 35/26\n\nFluorescent Lighting Inverters AD/LEARJET 35/27 Amdt 1\n\nCrew Oxygen Plumbing and Map Light Wire Protection AD/LEARJET 35/28\n\nRetirement Life - Fatigue Critical Components AD/LEARJET 35/29\n\n  \nFlight Management Systems AD/LEARJET 35/30\n\nEmergency Brake Handle AD/LEARJET 35/31\n\nTip Tank Flapper Valves AD/LEARJET 35/32\n\nOutflow/Safety Valve AD/LEARJET 35/33\n\nAuxiliary Cabin Heater Wiring AD/LEARJET 35/34 Amdt 1\n\nMach Limit AD/LEARJET 35/35\n\nSpoiler Actuators AD/LEARJET 35/36\n\nEmergency Procedures - AFM Amendment AD/LEARJET 35/37\n\nMain Landing Gear Tyre AD/LEARJET 35/38\n\nForward Engine Beam Shear Web AD/LEARJET 35/39","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope is not substantively changed. The instrument explicitly revokes listed ADs and re-makes them in the same form (Note). Legal effect is administrative: existing compliance obligations for the Gates Learjet 35/36 series continue unchanged, while administrative and record-keeping duties transfer to operators, maintainers and CASA to reflect the new instrument citations (see first paragraph and Schedule 1)."},"complexity_factors":["Multiple instruments involved: Schedule 1 lists a large number of ADs (39 entries), increasing administrative workload for reissuance and record-keeping (Schedule 1).","Legal mechanism is procedural: revocation and remaking is effected under a specific delegatory power (subregulation 39.001 (1)), which limits substantive policy complexity but requires correct statutory form (first paragraph).","Identical reissue: note states each AD is re-made in exactly the same form, reducing substantive change but creating transitional paperwork and cross-referencing challenges (Note: \"Each attached Airworthiness Directive is being re-made in exactly the same form...\").","Delegated decision-making: instrument signed by a CASA delegate (David Alan Villiers), so exercise of delegated authority and internal agency procedures matter for implementation (signature block).","Operator compliance burden: owners/operators and maintenance organisations must maintain compliance and update records to reference the new separate instruments, implying ongoing operational cost (Schedule 1 list of ADs).","Version-tracking complexity: many listed items show amendment markers (eg. \"Amdt 1\", \"Amdt 2\"), which requires careful attention to maintain the correct operative text across versions (Schedule 1 entries).","Transition risk: potential for temporary confusion where older AD citations remain in manuals or maintenance logs until the reissued instruments are recorded and circulated (implied by revocation and reissue mechanism)."],"plain_english_summary":"This instrument revokes a list of existing Airworthiness Directives (ADs) for Gates Learjet 35 and 36 series aircraft and re-issues each AD as a separate, identical instrument under CASA’s delegated power. It affects aircraft owners, operators and maintenance organisations, who must continue to comply with the listed ADs now published as fresh instruments. The change is administrative: it preserves the legal effect of the ADs while requiring reissuance, with compliance and record‑keeping costs falling on operators, maintainers and CASA."},"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 remaking the directives 'in exactly the same form as appears in the latest published edition.' This is a pure administrative renewal to maintain legal validity, with no expansion of scope beyond the original safety requirements for Gates Learjet 35 and 36 aircraft."},"complexity_factors":["Single, clear operative provision with two straightforward actions (revocation and remaking)","No defined terms section — relies on external understanding of 'Airworthiness Directive' and aircraft technical terminology","No conditional logic or nested exceptions in the instrument itself","Complexity is external: the 39 attached ADs contain detailed technical engineering requirements, but this instrument merely references them by name and number","Straightforward tabular schedule listing the 39 directives with brief descriptive titles","Extensive cross-referencing to external instruments (the attached ADs themselves), but no internal cross-references requiring navigation"],"plain_english_summary":"This instrument revokes and immediately reissues 39 airworthiness directives for Gates Learjet 35 and 36 series aircraft, reproducing each AD in exactly the same form. Its sole purpose is to refresh the legal validity of these binding safety orders without changing their substance.\n\nIt matters to owners, operators, maintenance organisations and CASA because it keeps those mandatory inspection, repair and modification requirements legally enforceable."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-35-and-36-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-35-and-36-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-35-and-36-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-35-and-36-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-35-and-36-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-35-and-36-series-aeroplanes/documents"}}