{"id":"F2006B07764","name":"Airworthiness Directives 2004 - Revocation and Remaking - Bell Helicopter Textron Canada (BHTC) 407 Series Helicopters","slug":"airworthiness-directives-2004-revocation-and-remaking-bell-helicopter-textron-canada-bhtc-407-series","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50523,"registerId":"commonwealth-F2006B07764-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 Helicopter Textron Canada (BHTC) 407 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 Helicopter Textron Canada (BHTC) 407 Series Helicopters\n\nAD Name AD Number\n\nNever Exceed Speed Reduction AD/BELL 407/1 Amdt 5\n\nWarning Horns AD/BELL 407/2\n\nThomas Coupling Pack - Cracked Discs - Inspection - CANCELLED AD/BELL 407/3\n\nGearbox Barrier Tape Replacement - CANCELLED AD/BELL 407/4\n\nHydraulic Relief Valve Replacement AD/BELL 407/5\n\nEngine to Transmission Driveshaft Replacement AD/BELL 407/6\n\nTail Rotor Hanger Bearing Support Inspection AD/BELL 407/7\n\nAirworthiness Limitations - CANCELLED AD/BELL 407/8\n\nTailboom Skin AD/BELL 407/9 Amdt 2\n\nOil Cooler Blower Assembly - Bearing Change - CANCELLED AD/BELL 407/10\n\nDoor Locking Mechanism AD/BELL 407/11\n\nCrew Seat Belt and Restraint Assembly AD/BELL 407/12\n\nOil Cooler Driveshaft Bearings Check - CANCELLED AD/BELL 407/13\n\nHorizontal Stabiliser Slat AD/BELL 407/14 Amdt 1\n\nEngine to Transmission Shaft AD/BELL 407/15 Amdt 1\n\nFuel Filler Cap Electrical Bonding AD/BELL 407/16\n\nForward Bearing Hanger Support AD/BELL 407/17\n\nFuel Line AD/BELL 407/18\n\nTail Rotor Gearbox AD/BELL 407/19\n\nTailboom Tail Rotor Gearbox Support Casting AD/BELL 407/20 Amdt 1\n\nTail Rotor Drive Shaft Bearings - CANCELLED AD/BELL 407/21 Amdt 2\n\nRescue Hoist AD/BELL 407/22\n\nSwashplate Drive Link AD/BELL 407/23\n\nTail Rotor Gearbox AD/BELL 407/24\n\nTail Rotor Drive Shaft Bearings AD/BELL 407/25 Amdt 1\n\nLanding Gear Cross Tubes AD/BELL 407/26\n\nPower Turbine RPM Steady State Operation Avoidance AD/BELL 407/27\n\nFreewheel Aft Bearing Cap AD/BELL 407/28","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive scope or technical requirements of the listed Airworthiness Directives. It revokes the listed ADs and re-makes each as a separate instrument 'in exactly the same form as appears in the latest published edition of the Directive' (Note), so the practical obligations on operators remain unchanged."},"complexity_factors":["Administrative re-issuance of multiple ADs rather than a single consolidated instrument (Schedule 1).","Number and variety of individual ADs listed (28 entries in Schedule 1) covering diverse technical subjects (e.g. gearboxes, driveshafts, stabilisers).","Some entries are marked CANCELLED or show amendments (e.g. 'Amdt 1', 'Amdt 2'), introducing potential for operator confusion about current effect (Schedule 1).","The instrument preserves the existing technical content unchanged — 'in exactly the same form' — so no substantive technical change but requires careful cross-checking with the latest published editions (Note).","Delegated decision-making under a statutory power: action taken by CASA delegate under subregulation 39.001(1) (instrument preamble).","Operational and compliance burden falls on aircraft owners/operators and maintenance organisations who must continue to apply each separate AD as republished (implied by function and listing of ADs in Schedule 1)."],"plain_english_summary":"This instrument revokes a list of Airworthiness Directives (ADs) that apply to Bell Helicopter Textron Canada (BHTC) 407 series helicopters and re-issues each listed AD as a separate instrument in the same form. It is an administrative re‑publication that affects owners, operators and maintenance organisations of BHTC 407 helicopters because those stakeholders must continue to comply with the same safety inspections, replacements or operating limits. The delegate of CASA acted under subregulation 39.001(1)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument maintains the same scope as the original Airworthiness Directives. The explicit note confirms each directive is re-made 'in exactly the same form' — this is purely administrative re-authorisation under CASR 1998, not an expansion of regulatory scope. The cancellation of 6 directives actually narrows the regulatory burden slightly by removing obsolete requirements."},"complexity_factors":["Single operative provision with straightforward (a)/(b) structure","No defined terms section — relies on external understanding of 'Airworthiness Directive' and aircraft technical terminology","Heavy reliance on Schedule 1 table for substantive content","Cross-reference to Civil Aviation Safety Regulations 1998 subregulation 39.001(1) for authority","Note creates interpretive guidance but no conditional logic","Technical subject matter (helicopter components) creates practical complexity despite legal simplicity"],"plain_english_summary":"The Civil Aviation Safety Authority is cancelling 28 existing Airworthiness Directives for Bell 407 helicopters and immediately re‑issuing them as fresh legal instruments—an administrative housekeeping step to place the rules on a proper legal footing under the Civil Aviation Safety Regulations 1998. This affects Bell 407 owners, operators and maintenance organisations. Most directives remain unchanged, but six specific ADs are being permanently cancelled."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-helicopter-textron-canada-bhtc-407-series","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-helicopter-textron-canada-bhtc-407-series/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-helicopter-textron-canada-bhtc-407-series/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-helicopter-textron-canada-bhtc-407-series/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-helicopter-textron-canada-bhtc-407-series/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-bell-helicopter-textron-canada-bhtc-407-series/documents"}}