{"id":"F2006B07878","name":"Airworthiness Directives 2004 - Revocation and Remaking - Gates Learjet 24 & 25 Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-gates-learjet-24-25-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50869,"registerId":"commonwealth-F2006B07878-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 24 & 25 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 24 & 25 Series Aeroplanes\n\nAD Name AD Number\n\nHorizontal Stabiliser - Inspection AD/LEARJET/1\n\nSpoiler Actuator Attachment Bolts - Replacement AD/LEARJET/2\n\nRudder Pedal Heel Plates - Inspection AD/LEARJET/3\n\nTip Tank Fuel Pressure Relief - Modification AD/LEARJET/4\n\nAirspeed - Machmeter Indicator Presentation - Modification AD/LEARJET/5\n\nWing Flap System - Inspection AD/LEARJET/6\n\nEmergency Exit Window, Seat-Back Operating Instruction Placard - AD/LEARJET/7\n\nMain Landing Gear Upper Strut - Inspection AD/LEARJET/8\n\nSpoiler Actuator Bracket And Bushing - Inspection AD/LEARJET/9\n\nSpoiler Centre Hinge Brackets - Inspection AD/LEARJET/10\n\nLower Cabin Door Jamb - Inspection AD/LEARJET/11\n\nControl System Stop Bolts - Replacement AD/LEARJET/12\n\nSpoiler System - Inspection AD/LEARJET/13\n\nUpper Cabin Door Locking Mechanism -Inspection And Modification AD/LEARJET/14 Amdt 1\n\nRefrigeration System Condenser Fan - Inspection and Replacement AD/LEARJET/15\n\nSecondary Yaw Damper Servo Cable Clamp Bolt - Inspection AD/LEARJET/16\n\nCabin Altitude Pressure Limiter - Installation AD/LEARJET/17 Amdt 1\n\nStall Warning System - Adjustment And Test AD/LEARJET/18\n\nAileron Lower Skin - Inspection AD/LEARJET/19\n\nUpper Cabin Door Lock Mechanism Bolts - Modification AD/LEARJET/20\n\nAft Engine Beam - Inspection AD/LEARJET/21\n\nAft Engine Beam Pylon Bolts - Inspection AD/LEARJET/22\n\nTailcone Service Area - Inspection AD/LEARJET/23 Amdt 1\n\nAutomatic Flight Controls Systems - Inspection and Modification AD/LEARJET/24\n\nAutomatic Flight Control System - Deactivation and Modification AD/LEARJET/25\n\nFlight Manual - Change To Metric Units AD/LEARJET/26\n\nHorizontal Stabiliser Hinge Pin Bushing Installation - Inspection AD/LEARJET/27\n\nAutomatic Flight Control Systems - Inspection and Modification AD/LEARJET/28\n\nAileron Trim Tab Balance Weight - Replacement AD/LEARJET/29\n\n  \nFlap System and Flap Sector Mounting Brackets AD/LEARJET/30 Amdt 2\n\nHandling Qualities and rodynamic Stall Characteristics - Modification AD/LEARJET/31\n\nBattery Vent System AD/LEARJET/32 Amdt 2\n\nStall Warning Accelerometer AD/LEARJET/33\n\nFlap Attachment Fittings AD/LEARJET/34\n\nCrew Oxygen Plumbing and Map Light Wire Protection AD/LEARJET/35\n\nTip Tank Flapper Valves AD/LEARJET/36\n\nOutflow/Safety Valve AD/LEARJET/37\n\nMain Landing Gear Tyre AD/LEARJET/38","sortOrder":0}],"analysis":{"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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The instrument explicitly revokes the listed ADs and re‑makes them “in exactly the same form as appears in the latest published edition” (note). Mechanically it reissues existing obligations rather than altering their substance; scope therefore remains unchanged, but administration and separate instrument status are modified (see action paragraph and Schedule 1)."},"complexity_factors":["Number of directives: Schedule 1 lists 38 separate ADs for the same aircraft family (AD/LEARJET/1 through AD/LEARJET/38).","Technical diversity: ADs cover many different systems (stabiliser, spoilers, fuel system, flight controls, landing gear, doors, electrical/ventilation, etc.), increasing operational and maintenance complexity.","Procedural action: legal technique is revocation and re‑making of instruments (action by CASA delegate under subregulation 39.001(1)), requiring administrative coordination.","Amendment history: several items show prior amendments (Amdt 1, Amdt 2), so record‑keeping and version control matter for compliance.","Compliance burden: repeated, potentially costly inspections/modifications across operators and maintenance organisations to meet each AD's requirements.","No substantive change claim: note states each AD is re‑made “in exactly the same form as appears in the latest published edition,” which limits legal reinterpretation but preserves prior obligations."],"plain_english_summary":"This instrument revokes a list of Airworthiness Directives (ADs) that apply to Gates Learjet 24 & 25 series aeroplanes and re‑issues each AD as a separate instrument in the same form. It affects owners, operators and maintenance organisations who must continue to follow the inspections, replacements, modifications or other measures set out in those ADs; the CASA delegate acts under subregulation 39.001(1) and operators bear the compliance cost."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The legislation maintains identical scope to the original directives. The note explicitly states each directive is 're-made in exactly the same form as appears in the latest published edition.' This is a pure administrative remaking with no expansion of subject matter, affected aircraft, or safety requirements."},"complexity_factors":["Very short document (under 2 pages)","No defined terms section","Simple binary structure: revoke old directives, make new ones","No conditional logic or exceptions","Single cross-reference to Civil Aviation Safety Regulations 1998 (subregulation 39.001(1))","Tabular schedule is purely descriptive, not operative","No substantive legal drafting — entirely procedural/administrative"],"plain_english_summary":"This CASA order cancels and reissues 38 Airworthiness Directives for Gates Learjet 24 and 25 series aircraft, replacing the old ADs with new legal instruments while leaving the safety requirements unchanged. It affects owners, operators, and maintenance engineers of those Learjets and ensures the directives remain valid and enforceable under current regulatory arrangements — an administrative update to preserve legal continuity without changing the rules."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-24-25-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-24-25-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-24-25-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-24-25-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-24-25-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gates-learjet-24-25-series-aeroplanes/documents"}}