{"id":"F2006B08046","name":"Airworthiness Directives 2004 - Revocation and Remaking - Turbomeca Turbine Engines - Turmo Series","slug":"airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-turmo-series","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115125,"registerId":"commonwealth-F2006B08046-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - Turbomeca Turbine Engines - Turmo Series","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\nTurbomeca Turbine Engines - Turmo Series\n\nAD Name AD Number\n\nEngine Components - Life Limits - CANCELLED AD/TURMO/1\n\nOil Scavenge Hose - Life Limitation AD/TURMO/2\n\nGas Generator Rear Bearing - Permeability Checks AD/TURMO/3\n\nFuel Control - Acceleration Unit AD/TURMO/4\n\nCentrifugal Compressor AD/TURMO/5 Amdt 3","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive scope or technical content of the listed Airworthiness Directives. It revokes the existing ADs and re‑issues them as separate instruments \"in exactly the same form as appears in the latest published edition of the Directive\" (Note). The effect is administrative (legal form and publication), not a change to compliance obligations or technical requirements."},"complexity_factors":["Legal formality: the instrument performs a straightforward revocation and re‑making of listed ADs under a single regulation (subreg 39.001(1)).","Number of directives: five ADs are listed in Schedule 1, requiring administrative tracking for each.","Administrative detail: the Note requires the re‑made ADs to match the latest published editions exactly, creating a requirement to verify textual identity on re‑issue.","Recordkeeping burden: operators and regulators must update references and records from the old instruments to the newly issued separate instruments (Schedule 1; Note).","One item is marked CANCELLED in Schedule 1 (AD/TURMO/1), which adds a small additional check on current applicability."],"plain_english_summary":"### What this instrument does\n- A delegate of the Civil Aviation Safety Authority (CASA) revokes a set of existing Airworthiness Directives (ADs) that apply to Turbomeca Turmo series turbine engines and re-issues each of them as separate, standalone instruments. This is done under the statutory power cited (subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998).\n\n### Who this affects\n- Aircraft owners and operators using Turbomeca Turmo series turbine engines.\n- Maintenance organisations and technicians who carry out inspections, parts replacement and life‑limit checks required by the ADs.\n- CASA and its delegate who administer and publish the ADs.\n\n### How it works mechanically\n- The delegate formally revokes the listed ADs and at the same time makes each of those ADs into its own separate instrument (see the delegate’s action in the instrument: “(a) revoke the Airworthiness Directives mentioned in Schedule 1; and (b) make, as separate instruments, each Airworthiness Directive mentioned in Schedule 1 and attached” (subreg 39.001(1))).\n- The ADs listed are: AD/TURMO/1 (Engine Components - Life Limits) noted as CANCELLED, AD/TURMO/2 (Oil Scavenge Hose - Life Limitation), AD/TURMO/3 (Gas Generator Rear Bearing - Permeability Checks), AD/TURMO/4 (Fuel Control - Acceleration Unit), and AD/TURMO/5 (Centrifugal Compressor) (Schedule 1).\n- The instrument records that each attached AD is being re‑made exactly in the same form as it appears in the latest published edition of the Directive (see Note). That indicates the re‑issue is intended to preserve the substantive content of each AD while changing their legal form or publication status.\n\n### Why it matters and practical implications\n- Purpose claim: the instrument’s stated effect is administrative—revocation and re‑making of the listed ADs in separate-instrument form (subreg 39.001(1); Note).\n\n- Compliance and who pays: affected aircraft operators and maintenance providers remain responsible for meeting the requirements set out in each AD (inspections, life‑limit replacements, checks). The instrument itself does not change those requirements if the re‑made ADs are identical (Note). Any direct costs of complying with those requirements (parts, labour, downtime) are borne by the operators and their service providers (Schedule 1 items).\n\n- Administrative costs and recordkeeping: re‑issuing ADs as separate instruments creates an administrative task for CASA (to issue and publish the separate instruments) and for operators (to track and refer to the newly issued ADs). If the content is identical, the substantive technical obligations do not change, but there is a small administrative burden in updating records and references (Note; Schedule 1).\n\n- Decision authority and discretion: the action is taken by a CASA delegate under the cited regulation (subreg 39.001(1)). The instrument demonstrates that the delegate has the authority to revoke and re‑issue ADs as instruments; the text does not expand or restrict the substantive content of the ADs themselves (subreg 39.001(1); Note).\n\n- Risk and implementation trade‑offs: because the ADs are re‑made “in exactly the same form” as the latest published editions, the main implementation risk is administrative (ensuring operators and maintainers are aware of the re‑issued instruments and that records cite the current instrument numbers). The instrument does not, on its face, change technical compliance obligations or introduce new technical requirements (Note).\n\n### Source references\n- Authority for the delegate’s action: subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998 (text of instrument).\n- List of affected ADs: Schedule 1 in the instrument.\n- Statement that content is unchanged: the Note that each attached AD is re‑made “in exactly the same form as appears in the latest published edition of the Directive.”"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument performs exactly what its title describes: revoking and remaking specific Airworthiness Directives. There is no expansion beyond this narrow administrative purpose. The scope has not grown beyond the original intent of restructuring these five directives as separate instruments."},"complexity_factors":["Very short instrument (under 300 words)","Only 5 items in schedule, presented in simple table format","No defined terms section — relies on existing CASA and aviation terminology","No conditional logic or nested exceptions","Single operative provision with straightforward (a) and (b) structure","Cross-references limited to one subregulation (39.001(1)) and internal schedule references","Purpose is purely administrative — no substantive regulatory requirements imposed directly by this instrument"],"plain_english_summary":"**What this legislation does:**\n\nThis is an administrative instrument issued by the Civil Aviation Safety Authority (CASA) that **revokes and immediately remakes** five specific Airworthiness Directives (ADs) for Turbomeca Turmo series turbine engines.\n\n**Who it affects:**\n- Owners and operators of aircraft using Turbomeca Turmo engines (commonly used in helicopters like the Puma and Super Frelon)\n- Aircraft maintenance engineers and organisations\n- CASA itself (as the regulator)\n\n**Why it matters:**\nAirworthiness Directives are **legally binding safety orders** that require specific maintenance actions, inspections, or modifications to aircraft components. They are issued when unsafe conditions are discovered that could affect flight safety.\n\nThis instrument performs a **technical housekeeping exercise**: it cancels the old versions of these five directives and reissues them as **separate, standalone legal instruments** rather than keeping them bundled together in the 2004 compilation. The content of each directive stays exactly the same — nothing changes for aircraft operators in terms of what maintenance they must perform. The only change is the legal structure: each AD now exists as its own document.\n\n**The five directives cover:**\n- **AD/TURMO/1** — *Cancelled* (this directive is being withdrawn entirely)\n- **AD/TURMO/2** — Oil scavenge hose life limits (how long before hoses must be replaced)\n- **AD/TURMO/3** — Checking the gas generator rear bearing for permeability (detecting potential failures)\n- **AD/TURMO/4** — Fuel control acceleration unit requirements\n- **AD/TURMO/5 Amdt 3** — Centrifugal compressor maintenance requirements\n\nThis \"revoke and remake\" process ensures each directive can be updated individually in future without affecting the others."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-turmo-series","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-turmo-series/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-turmo-series/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-turmo-series/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-turmo-series/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-turbomeca-turbine-engines-turmo-series/documents"}}