{"id":"F2006B07766","name":"Airworthiness Directives 2004 - Revocation and Remaking - Bell UH-1 Series Helicopters","slug":"airworthiness-directives-2004-revocation-and-remaking-bell-uh-1-series-helicopters","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50531,"registerId":"commonwealth-F2006B07766-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 - Bell UH-1 Series Helicopters","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\nBell UH-1 Series Helicopters\n\nAD Name AD Number\n\nTail Rotor Blades AD/UH-1/1\n\nTail Rotor Slider AD/UH-1/2\n\nTail Boom Vertical Spar - CANCELLED AD/UH-1/3\n\nTail Rotor Yoke AD/UH-1/4\n\nTailboom Vertical Fin Spar AD/UH-1/5 Amdt 2\n\nMain Rotor Mast and Trunnion AD/UH-1/6 Amdt 2\n\nTail Rotor Grip AD/UH-1/7\n\nTail Rotor Hub AD/UH-1/8\n\nTail Rotor Grips AD/UH-1/9\n\nTail Rotor Gearbox Duplex Bearings AD/UH-1/10\n\nPillow Block Bolts and Hardware AD/UH-1/11\n\nTail Rotor Driveshaft Hangar Bearings AD/UH-1/12\n\n42 degree Gearbox AD/UH-1/13\n\nRetirement Lives of Fatigue Critical Components - CANCELLED AD/UH-1/14\n\nUH-1 Component Review - CANCELLED AD/UH-1/15\n\nMain Rotor Mast P/N 204-011-450-001 & -005 AD/UH-1/16\n\nTail Rotor Grips - 2 AD/UH-1/17\n\nMain Rotor Tension-Torsion Strap AD/UH-1/18","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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument maintains exactly the same scope as the original Airworthiness Directives. The note explicitly confirms each directive is re-made \"in exactly the same form.\" The scope has not expanded; this is purely administrative re-instrumentation to improve legal clarity and accessibility."},"complexity_factors":["Very short instrument (under 500 words)","Only 1 defined term (the delegate's authority under subregulation 39.001(1))","Simple binary structure: revoke (a) and make (b)","No conditional logic or exceptions","Schedule 1 is a straightforward table with 18 rows and 2 columns","Cross-references limited to the Civil Aviation Safety Regulations 1998 (single citation)","No nested provisions or sub-subsections"],"plain_english_summary":"This CASA safety order revokes and re‑issues 18 Airworthiness Directives for Bell UH‑1 helicopters in Australia, re‑making each directive \"in exactly the same form\" as before. It’s an administrative reshuffle—no safety requirements change—but affects owners, operators, maintenance engineers and other stakeholders because it keeps the legal framework for flight‑critical components intact. Two directives were cancelled entirely (AD/UH‑1/3 and AD/UH‑1/14 and 15), removing those specific requirements."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive scope of the listed ADs. It expressly revokes the listed ADs and re‑makes each as a separate attached instrument 'in exactly the same form as appears in the latest published edition' (main instrument text and Schedule 1). Several entries are identified as 'CANCELLED' in Schedule 1, which removes those items from effect rather than expanding AD scope."},"complexity_factors":["Legal formality: revocation and re‑making of instruments (authority: acting under subregulation 39.001(1)).","Volume and enumeration: Schedule 1 lists many ADs spanning different components (tail rotor, main rotor, tailboom, etc.), increasing administrative tracking.","Partial cancellations: several entries in Schedule 1 are marked 'CANCELLED', requiring careful attention to which ADs remain operative.","No substantive change: note states each AD is re‑made 'in exactly the same form as appears in the latest published edition', reducing doctrinal complexity but creating transition tasks.","Compliance burden: operators must update records and ensure continuing compliance with the re‑made ADs even though requirements are unchanged (mechanical effect described in instrument).","Implementation risk: potential for temporary confusion about instrument identity and attachment versus prior publications during the transition from old to re‑made ADs."],"plain_english_summary":"This instrument, made by a delegate of the Civil Aviation Safety Authority under subregulation 39.001(1), revokes a list of Airworthiness Directives (ADs) for Bell UH-1 series helicopters and re-makes each AD as a separate, attached instrument in the same form as the latest published edition. It primarily affects owners, operators and maintainers of Bell UH-1 helicopters by preserving existing mandatory maintenance and safety requirements while changing the legal form in which those ADs are issued."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-uh-1-series-helicopters","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-uh-1-series-helicopters/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-uh-1-series-helicopters/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-uh-1-series-helicopters/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-uh-1-series-helicopters/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-uh-1-series-helicopters/documents"}}