{"id":"F2006B07840","name":"Airworthiness Directives 2004 - Revocation and Remaking - Diamond (HOAC) Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-diamond-hoac-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50772,"registerId":"commonwealth-F2006B07840-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 - Diamond (HOAC) Series Aeroplanes","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 20.2\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n Airworthiness Directives 2004\n\n I, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety\n\n Authority, acting under subregulation 39.001 (1) of the Civil\n\n Aviation Safety Regulations 1998:\n\n (a) revoke the Airworthiness Directives mentioned in\n\n Schedule 1; and\n\n (b) make, as separate instruments, each Airworthiness\n\n Directive mentioned in Schedule 1 and attached.\n\n \n\n ![](image.001.png)\n\n David Villiers\n\n Delegate of the Civil Aviation Safety Authority\n\n \n\n  20 December 2004\n\n Note:   Each attached Airworthiness Directive is being re-made in exactly the\n\n same form as appears in the latest published edition of the Directive.\n\n \n\n\n Schedule 1 Revocation and Remaking of\n\n Airworthiness Directives\n\n Diamond (HOAC) Series Aeroplanes\n\n AD Name AD Number\n\n Operational Limitation AD/DIAMOND/1\n\n Fuel Pump Hose Replacement AD/DIAMOND/2\n\n Nose Wheel Leg AD/DIAMOND/3\n\n Canopy Locking Mechanism AD/DIAMOND/4\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive scope or content of the listed Airworthiness Directives. It revokes the existing ADs and re‑issues each as a separate instrument in the same form as the latest published edition (see the instrument's note stating: \"Each attached Airworthiness Directive is being re-made in exactly the same form as appears in the latest published edition of the Directive\"). The list of affected ADs is unchanged (see Schedule 1)."},"complexity_factors":["Single procedural purpose: revocation and re‑making of existing directives rather than introduction of new substantive rules.","Small, bounded subject matter: four named Airworthiness Directives affecting one aircraft series (see Schedule 1).","Cross-reference to an external regulation as the legal authority (subregulation 39.001(1)), requiring awareness of that parent regulation for full context.","Explicit requirement that the re‑made ADs be identical to the latest published editions reduces legal ambiguity about substantive change.","Administrative detail (making separate instruments) introduces minor procedural complexity around instrument numbering and recordkeeping."],"plain_english_summary":"What this instrument does\n\n- The delegate of the Civil Aviation Safety Authority (CASA) revokes a set of existing Airworthiness Directives (ADs) and re‑makes each of them as separate legal instruments (see: \"revoke the Airworthiness Directives mentioned in Schedule 1; and make, as separate instruments, each Airworthiness Directive mentioned in Schedule 1 and attached\").\n- The instrument names the affected ADs in Schedule 1: Operational Limitation (AD/DIAMOND/1), Fuel Pump Hose Replacement (AD/DIAMOND/2), Nose Wheel Leg (AD/DIAMOND/3), and Canopy Locking Mechanism (AD/DIAMOND/4).\n- The delegate doing this is David Alan Villiers, acting under subregulation 39.001 (1) of the Civil Aviation Safety Regulations 1998 (see text: \"I, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety Authority, acting under subregulation 39.001 (1) ...\").\n\nWho is affected\n\n- Owners, operators, and maintenance organisations responsible for Diamond (HOAC) series aeroplanes are the practical addressees because the listed ADs apply to those aeroplanes (see Schedule 1). The instrument modifies only how the ADs are recorded as legal instruments; it does not change the target aircraft class listed in the Schedule.\n\nWhy it matters (mechanics and immediate effects)\n\n- Mechanically, the instrument removes the existing versions of the listed ADs and issues each of them again as a separate instrument. The instrument expressly states that each re‑made AD is identical to the latest published edition of that Directive (see note: \"Each attached Airworthiness Directive is being re-made in exactly the same form as appears in the latest published edition of the Directive.\").\n- Because the texts are re‑made in identical form, the substantive obligations or requirements contained in those ADs do not change as a result of this revocation/remaking step. Any work, inspections, or parts changes required by the ADs (if any) remain as they were in the latest published editions; this instrument does not introduce new technical requirements.\n\nWho pays, who decides, and what changes in behaviour\n\n- Who decides: a CASA delegate exercised statutory authority under subregulation 39.001(1) to carry out this administrative action (text as cited above).\n- Who pays: if the ADs require technical work or parts, the responsible owners/operators continue to bear those implementation costs; this instrument does not alter those obligations because it preserves the AD texts in their latest form (see the note quoted above).\n- What behaviour changes: the only procedural change is that each AD will exist as a separate legal instrument; compliance behaviour required by the ADs themselves remains unchanged.\n\nImplementation, compliance burden and risks\n\n- Compliance burden for operators is unchanged by this instrument because the operative content of the ADs is unchanged (see note). The instrument imposes an administrative task on CASA to revoke and re‑issue the ADs as separate instruments.\n- Discretion: the action was taken by a named CASA delegate under a specific subregulation, so the decision to revoke and re‑make rests with that delegated statutory power (see subregulation citation). The text does not record further discretionary criteria or conditions for this choice.\n- Implementation risk and trade‑offs: because the re‑made ADs are identical to the latest published editions, the risk of substantive surprise to operators is low; the primary cost is administrative (CASA time and recordkeeping) and any transitional administrative adjustments by holders of AD copies who must note the new instrument numbers or formal citations.\n\nSource pointers\n\n- Authority for the action: \"acting under subregulation 39.001 (1) of the Civil Aviation Safety Regulations 1998.\"  \n- The procedural action: \"revoke the Airworthiness Directives mentioned in Schedule 1; and make, as separate instruments, each Airworthiness Directive mentioned in Schedule 1 and attached.\"  \n- Statement that text is unchanged: \"Each attached Airworthiness Directive is being re-made in exactly the same form as appears in the latest published edition of the Directive.\"  \n- Schedule 1 lists the four ADs by name and number for Diamond (HOAC) series aeroplanes."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument explicitly states that each directive is being remade 'in exactly the same form as appears in the latest published edition.' This is a pure administrative remaking to ensure proper legislative authority, with no expansion of scope or substantive change to the safety requirements."},"complexity_factors":["Very short instrument (under 300 words)","Only 4 defined items in Schedule 1 (the four AD numbers)","No nested conditional logic or exceptions","No cross-references to other legislation beyond the enabling regulation (subregulation 39.001(1))","Straightforward administrative action: revoke and remake in identical form","Single operative clause with two simple limbs (a) and (b)"],"plain_english_summary":"This is an official aviation safety instrument that **revokes and immediately remakes four specific airworthiness directives** for Diamond (HOAC) series aeroplanes.\n\n**What it does:**\n- **Revokes** four existing safety directives (AD/DIAMOND/1 through AD/DIAMOND/4) that were previously in force\n- **Remakes** those same four directives as new, separate legal instruments, keeping them **exactly the same** as they were before\n\n**The four directives cover:**\n- **AD/DIAMOND/1**: Operational limitations on how the aircraft can be used\n- **AD/DIAMOND/2**: Replacement requirements for fuel pump hoses\n- **AD/DIAMOND/3**: Requirements for the nose wheel leg (landing gear component)\n- **AD/DIAMOND/4**: Requirements for the canopy locking mechanism\n\n**Who it affects:**\n- Owners and operators of Diamond (HOAC) series aeroplanes\n- Maintenance organisations servicing these aircraft\n- Pilots flying these aircraft\n\n**Why it matters:**\nAirworthiness directives are **legally binding safety orders** issued when a design flaw, maintenance issue, or operational problem is found that could affect flight safety. This instrument ensures these four safety requirements remain in force under current regulations. The revocation and remaking process is typically done to ensure the directives sit under the correct legal authority or regulatory framework—here, the Civil Aviation Safety Regulations 1998."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-diamond-hoac-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-diamond-hoac-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-diamond-hoac-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-diamond-hoac-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-diamond-hoac-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-diamond-hoac-series-aeroplanes/documents"}}