{"id":"F2006B07984","name":"Airworthiness Directives 2004 - Revocation and Remaking - Propellers - General","slug":"airworthiness-directives-2004-revocation-and-remaking-propellers-general","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115033,"registerId":"commonwealth-F2006B07984-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 - Propellers - General","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\nPropellers - General\n\nAD Name AD Number\n\nPropellers - Overhaul AD/PROP/1 Amdt 2\n\nFeathering Propellers - Functional Check AD/PROP/2 Amdt 2\n\nPropeller Blade Bearings - CANCELLED AD/PROP/3 Amdt 1\n\nOverhaul Affected Propellers AD/PROP/4","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument performs a narrow, technical administrative function. It does not expand the scope of airworthiness regulation — it merely maintains the existing regulatory framework by reissuing existing directives in a new legal form. The scope remains identical to the original intent: ensuring propeller safety through mandatory maintenance directives."},"complexity_factors":["Very short document (approximately 200 words)","Only 4 specific items being processed","Simple binary structure: revoke (a) and remake (b)","No defined terms section — relies on external understanding of 'Airworthiness Directive'","Single cross-reference to Civil Aviation Safety Regulations 1998 (subregulation 39.001(1))","No conditional logic, exceptions, or nested provisions","Straightforward tabular schedule with only 3 columns","Explicit statement that content is unchanged ('exactly the same form')"],"plain_english_summary":"**What this legislation does:**\n\nThis is an official decision by a senior aviation safety officer (David Villiers, acting for the Civil Aviation Safety Authority) to **revoke and remake four specific Airworthiness Directives** relating to aircraft propellers.\n\n**What are Airworthiness Directives?**\nThese are legally binding safety instructions issued to aircraft owners and operators. They require specific inspections, repairs, or modifications to fix unsafe conditions in aircraft, engines, or propellers. Think of them as mandatory \"recall notices\" for aviation equipment.\n\n**What exactly is happening here:**\n- **Revoking**: Four existing directives are being formally cancelled in their current form\n- **Remaking**: The same four directives are being reissued as brand new, separate legal instruments\n- **No changes**: The note makes clear each directive is being remade in **exactly the same form** as before — this is purely an administrative housekeeping exercise\n\n**The four affected directives cover:**\n- **AD/PROP/1**: Requirements for propeller overhauls (maintenance procedures)\n- **AD/PROP/2**: Functional checks for feathering propellers (propellers that can turn blades flat to reduce drag when engines fail)\n- **AD/PROP/3**: A directive about propeller blade bearings that has already been **cancelled** — this formalises that cancellation\n- **AD/PROP/4**: Overhaul requirements for specific affected propellers\n\n**Who it affects:**\n- Aircraft owners and operators with propeller-driven aircraft\n- Licensed aircraft maintenance engineers\n- Propeller overhaul facilities\n\n**Why it matters:**\nThis is **administrative tidying** under Australia's civil aviation regulations. The Civil Aviation Safety Authority periodically consolidates, revokes, and remakes directives to keep the regulatory framework current and properly structured. Even though the content isn't changing, the legal \"instrument\" itself is being refreshed to ensure it sits correctly within the regulatory system."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument does not change the substantive scope or requirements of the listed Airworthiness Directives. It revokes the listed ADs and re‑issues them as separate instruments in the same form as the latest published edition, so the regulatory obligations that applied before continue to apply unchanged under newly issued instruments (opening paragraph; Schedule 1; Note)."},"complexity_factors":["Instrument is purely procedural (revocation and re‑making) rather than substantive","Single statutory power referenced: subregulation \"39.001 (1)\"","Small list of named ADs in Schedule 1 (four items, one marked CANCELLED)","Explicit Note that re‑made ADs are in exactly the same form reduces interpretative ambiguity","Potential minor administrative complexity for affected operators to update records"],"plain_english_summary":"This instrument, signed by a CASA delegate under subregulation 39.001(1), revokes a short list of existing Airworthiness Directives and re‑issues each as separate instruments. The re‑made ADs are identical in substance to the latest published editions, so technical and compliance obligations for operators, maintenance organisations and propeller owners remain unchanged. The effect is administrative: publication and record‑keeping now reference separate instruments rather than the prior consolidated versions."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-general","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-general/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-general/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-general/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-general/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-general/documents"}}