{"id":"F2006B07899","name":"Airworthiness Directives 2004 - Revocation and Remaking - Helio Courier Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-helio-courier-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50916,"registerId":"commonwealth-F2006B07899-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 - Helio Courier 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\nHelio Courier Series Aeroplanes\n\nAD Name AD Number\n\nWing Centre Section Main Spar Carry Thru Assembly AD/HELIO/1 Amdt 1\n\nFront Seat Restraint Installation - Modification AD/HELIO/2\n\nWing Centre Section Main Spar Carry Thru Assembly - CANCELLED AD/HELIO/3 Amdt 1","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The instrument mainly reissues two existing Airworthiness Directives in identical form (so their substantive scope remains unchanged), but it revokes and marks one AD (AD/HELIO/3 Amdt 1) as CANCELLED in Schedule 1. Therefore the overall legal scope is altered only with respect to that cancelled AD (removal of its requirements); the other listed ADs retain their prior content. (See Schedule 1 and the Note.)"},"complexity_factors":["Instrument performs a narrow administrative task (revocations and re-making) rather than creating new substantive rules.","Reference to external regulatory power (subregulation 39.001(1)) requires locating that provision for full legal context.","Multiple listed ADs with differing treatment (two re-made unchanged; one explicitly cancelled) requires attention to Schedule 1 to determine net effect.","Potential for transitional confusion (revocation followed by re-issue) adds practical but low legal complexity."],"plain_english_summary":"What this instrument does, in plain terms:\n\n- It cancels (revokes) three existing Airworthiness Directives (ADs) that apply to Helio Courier series aeroplanes and re-issues two of them as separate, identical instruments. (See operative paragraphs (a) and (b), and Schedule 1.)\n\n- The action is taken by David Alan Villiers, a delegate of the Civil Aviation Safety Authority (CASA), using the power in subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998. The instrument is dated 20 December 2004. (See the opening paragraph and signature block.)\n\nWhich ADs are affected: (Schedule 1)\n- AD/HELIO/1 Amdt 1 — Wing Centre Section Main Spar Carry Thru Assembly: revoked and re-made as a separate instrument. (Schedule 1)\n- AD/HELIO/2 — Front Seat Restraint Installation - Modification: revoked and re-made as a separate instrument. (Schedule 1)\n- AD/HELIO/3 Amdt 1 — Wing Centre Section Main Spar Carry Thru Assembly — CANCELLED: revoked and shown as cancelled in the schedule (i.e. not re-made). (Schedule 1)\n\nOfficial stated reason and practical effect:\n- The instrument states that each attached AD is being re-made in exactly the same form as the latest published edition. That is the stated, source-provided rationale for re-making the listed ADs without textual change. (See the Note.)\n\nWho decides and who pays:\n- The decision-maker is a CASA delegate (David Alan Villiers) acting under subregulation 39.001(1). (Opening paragraph.)\n- The businesses and individuals most directly affected are owners/operators/maintenance organisations for Helio Courier series aeroplanes. Those operators are the parties who must comply with any continuing AD obligations; if an AD imposes maintenance, inspection or modification requirements, the operator bears the cost of complying. The instrument itself remakes two ADs in the same form (so it does not add new compliance obligations) and indicates one AD is cancelled (which removes that particular specified obligation). (See Schedule 1 and the Note.)\n\nIncentives, trade-offs and implementation points (tested against the instrument text):\n- Administrative objective: The instrument is an administrative revocation and re-making of ADs so that each directive exists as a separate, standalone instrument in the published record. The Note explicitly says the remade ADs are identical to the latest published edition; therefore the content of those ADs does not change as a result of this instrument. (See Note; operative paras (a)–(b).)\n\n- Costs and who bears them: Because the remade ADs are stated to be identical, there is no new technical compliance cost introduced by this instrument for those ADs; ongoing costs associated with complying with the substantive AD requirements remain with operators/maintenance providers as before. For the AD shown as CANCELLED (AD/HELIO/3), removal of that AD would reduce or remove the associated compliance cost for affected operators if that AD previously imposed obligations. (See Schedule 1 and the Note.)\n\n- Compliance burden and paperwork: There is an administrative burden on CASA to revoke and re-issue instruments and on operators to update records and references to the applicable ADs. The instrument does not describe any transitional arrangements; that transition risk (temporary confusion over which instrument applies) is a practical implementation risk implicit in revocation/remaking processes. (Operative paras (a)–(b); Note.)\n\n- Bureaucratic discretion and legal basis: The delegate acts under subregulation 39.001(1). The instrument exercises delegated regulatory power to revoke and re-make instruments. The text does not open or limit future discretion; it records a specific administrative exercise of that power. (Opening paragraph.)\n\n- Effects on private choice and market activity: Because two ADs are reissued without textual change, there is no new constraint on private decisions beyond the pre-existing AD requirements. The cancellation of AD/HELIO/3 removes an identified directive, which can expand private choice for operators previously subject to that AD’s requirements. The instrument does not alter competition, ownership or pricing rules directly; any downstream economic effects are limited to compliance cost changes for the small population of Helio Courier operators. (Schedule 1; Note.)\n\nNet practical takeaway:\n- This is primarily an administrative measure: two Helio Courier ADs are revoked and re-made in the same form (no substantive change to obligations), and one AD is revoked and shown as cancelled (removing its obligations). The delegate of CASA carried out this action under an express regulation-making power. (Operative paras, Schedule 1, Note.)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument maintains identical scope to the original Airworthiness Directives. It is purely a remaking exercise with no expansion of regulatory reach. The delegate explicitly notes each directive is being remade in 'exactly the same form' as the latest published edition."},"complexity_factors":["Very short instrument (under 300 words)","Only 3 substantive items in Schedule 1","No defined terms section","No conditional logic or nested exceptions","Single operative provision with straightforward (a) and (b) structure","Cross-reference only to enabling regulation (subregulation 39.001(1)) and the attached schedules","Explicit statement that content is unchanged ('exactly the same form') reducing interpretive burden"],"plain_english_summary":"**What this legislation does:**\n\nThis instrument is a housekeeping exercise by the Civil Aviation Safety Authority (CASA). It **revokes** (cancels) three existing Airworthiness Directives (ADs) for Helio Courier series aeroplanes and **immediately remakes** them as three separate, standalone legal instruments.\n\n**Who it affects:**\n\n- **Owners and operators** of Helio Courier series aircraft\n- **Maintenance engineers** who work on these aircraft\n- **CASA** itself, as the aviation safety regulator\n\n**Why it matters:**\n\nAirworthiness Directives are legally binding safety orders. They require specific inspections, modifications, or repairs to address unsafe conditions in aircraft. This instrument doesn't change the actual safety requirements — the three ADs are being remade \"in exactly the same form\" as before. The purpose is **administrative**: to restructure how these directives exist in the law, likely to improve clarity, separate them for easier reference, or comply with changes in how CASA manages its regulatory instruments.\n\nThe three affected directives cover:\n- **AD/HELIO/1 Amdt 1**: Inspections of the wing centre section main spar (a critical structural component)\n- **AD/HELIO/2**: Installation of front seat restraints (safety harnesses)\n- **AD/HELIO/3 Amdt 1**: A cancelled directive regarding the same wing spar component\n\n**In short:** If you fly or maintain a Helio Courier, nothing changes in practice — but the paperwork just got reorganised."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-helio-courier-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-helio-courier-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-helio-courier-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-helio-courier-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-helio-courier-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-helio-courier-series-aeroplanes/documents"}}