{"id":"F2006B07893","name":"Airworthiness Directives 2004 - Revocation and Remaking - Gulfstream (Grumman) G.159 Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-gulfstream-grumman-g-159-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50902,"registerId":"commonwealth-F2006B07893-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 - Gulfstream (Grumman) G.159 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\nGulfstream (Grumman) G.159 Series Aeroplanes\n\nAD Name AD Number\n\nFlap Drive Control Gearbox - Replacement of Sheave Guard AD/G159/1\n\nFuel Pressure Switches - Relocation AD/G159/2\n\nFlight Data Recorder and Flight Crew Compartment Voice Recorder - AD/G159/3 Amdt 1\n\nMain Landing Gear Retract Cylinder Attach Fitting - Inspection and Modification AD/G159/4\n\nAPU Turbine Wheel - Inspection AD/G159/5 Amdt 2\n\nEngine Driven Cabin Compressors - Inspection - CANCELLED AD/G159/6\n\nSuperseded AD/G159/7\n\nSuperseded AD/G159/8\n\nLower Centre Section Skin - Inspection AD/G159/9\n\nInstallation of Accessory Gearbox Generator Baffle and Supercharger Drain Line AD/G159/10\n\nEngine Mount Chafing AD/G159/11 Amdt 1\n\nElevator Trim Tab Horn Fitting - Modification AD/G159/12\n\nTrim Tab Actuators AD/G159/13 Amdt 3\n\nSuperseded AD/G159/14\n\nNose Landing Gear Uplock Bellcrank - Inspection AD/G159/15\n\nEngine Breather Overheat Detector - Max Setting AD/G159/16\n\nWing Front Beam - Wing to Fuselage Fitting - Inspection AD/G159/17\n\nLife Limited Components - Retirement AD/G159/18 Amdt 2\n\nLanding Gear AD/G159/19 Amdt 4\n\nWater Methanol Tank - Inspection AD/G159/20\n\nWing Rear Beam Upper Cap Splice Angles - Inspection AD/G159/21\n\nNose Landing Gear Downlock System - Inspection AD/G159/22 Amdt 1\n\nFuselage Aft Pressure Dome - Inspection and Modification AD/G159/23\n\nCANCELLED AD/G159/24 Amdt 2\n\nAileron and Elevator Tabs - Inspection AD/G159/25\n\nMain Landing Gear Uplock Beam Bracket - Inspection AD/G159/26\n\nLanding Gear and Oxygen Systems Gas Cylinders - Inspection and Replacement AD/G159/27\n\nWing Lower Surface - Inspection AD/G159/28\n\nCANCELLED AD/G159/29\n\n  \nEngine Nacelle Firewall - Inspection AD/G159/30 Amdt 1\n\nEngine Fire Extinguisher Switch - Inspection AD/G159/31\n\nJumpseat Placard - Installation AD/G159/32 Amdt 1\n\nMain Entry Door - Inspection AD/G159/33\n\nOuter Wing to Integral Tank Front and Rear Beam Splices - Inspection AD/G159/34\n\nFuselage Top Escape Hatch Structure - Inspection AD/G159/35\n\nCANCELLED AD/G159/36\n\nMain Landing Gear Uplock Beam Assembly - Inspection AD/G159/37\n\nControl Column Wheel Attaching Shaft - Inspection AD/G159/38\n\nFlight Manual - Change to Metric Units AD/G159/39\n\nMain and Nose Landing Gear Uplock Cylinder Attach Bolts - Replacement AD/G159/40\n\nEngine Mount - Inspection and Retirement AD/G159/41\n\nElectrical Power Distribution Protection AD/G159/42\n\nFluorescent Lighting Installations Incorporating Series 66 Lamps AD/G159/43 Amdt 1\n\nAir Intake Cowling AD/G159/44\n\nMLG Uplock Beam Forward Brackets AD/G159/45\n\nMLG Retract Cylinder Attachment Fittings AD/G159/46","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument is administrative: it revokes the listed ADs and re-makes each as a separate instrument without changing their content (instrument text and note). Therefore the scope of regulatory requirements for G.159 operators remains the same; obligations, costs and compliance duties continue as previously set out. (See action under subregulation 39.001(1) and the Note: \"Each attached Airworthiness Directive is being re-made in exactly the same form as appears in the latest published edition of the Directive.\"; Schedule 1 lists the affected ADs.)"},"complexity_factors":["Large number of ADs listed in Schedule 1 (many discrete directives to track and re-issue).","Mixture of statuses in the list (active ADs, superseded entries, and several explicitly CANCELLED ADs) increases administrative tracking needs (see Schedule 1 entries such as AD/G159/6 CANCELLED; AD/G159/7 Superseded).","Legal authority is simple and singular (action taken under subregulation 39.001(1)), reducing substantive legal complexity.","Document preserves identical substantive content (note: \"re-made in exactly the same form\"), so substantive compliance requirements do not change, lowering interpretation complexity.","Operational complexity for industry arises from ensuring continuity of compliance across multiple re-issued instruments (coordination by operators and maintenance organisations)."],"plain_english_summary":"This instrument, signed by a CASA delegate under subregulation 39.001(1), formally revokes a list of Airworthiness Directives (ADs) for Gulfstream (Grumman) G.159 series aeroplanes and re-issues each AD as a separate instrument in the same form (see instrument and note). It affects owners, operators and maintenance organisations of G.159 aircraft who must continue to meet the inspection, modification and replacement requirements set out in those ADs; the change is administrative, preserving existing obligations and compliance costs."},"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 legislation maintains its original scope. This is a procedural instrument that preserves the existing regulatory framework for G.159 aircraft without expanding, contracting, or altering the substantive safety requirements. The note explicitly states each AD is being re-made 'in exactly the same form' as the current published edition."},"complexity_factors":["Single, clear purpose: revocation and remaking of existing instruments","No substantive amendments to the technical content of the ADs","Straightforward tabular schedule listing 46 ADs with simple status indicators (Amdt, CANCELLED, Superseded)","Minimal conditional logic — operates as a blanket revocation and reissue","No complex cross-referencing beyond citing the enabling regulation (subregulation 39.001(1))","Short document (approximately 1 page of operative text plus schedule)","Only one defined term implicitly used (Airworthiness Directive)"],"plain_english_summary":"This CASA order revokes and reissues 46 Airworthiness Directives for Gulfstream (Grumman) G.159 aeroplanes in Australia, recreating them in identical form to preserve their legal effect. It affects owners/operators, maintenance engineers and organisations, and the aircraft themselves by keeping mandatory inspections, replacements and modifications (landing gear, engines/fuel, structure, recorders, emergency systems) enforceable. The action is a legal housekeeping step to maintain AD validity without changing technical requirements."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gulfstream-grumman-g-159-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gulfstream-grumman-g-159-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gulfstream-grumman-g-159-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gulfstream-grumman-g-159-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gulfstream-grumman-g-159-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-gulfstream-grumman-g-159-series-aeroplanes/documents"}}