{"id":"F2006B07987","name":"Airworthiness Directives 2004 - Revocation and Remaking - Propellers - Variable Pitch - De Havilland","slug":"airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-de-havilland","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115037,"registerId":"commonwealth-F2006B07987-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 - Variable Pitch - De Havilland","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 - Variable Pitch - De Havilland\n\nAD Name AD Number\n\nModel 3/1000/2 - Hub Modification AD/PDH/1\n\nModel 3/1000/2 - Propeller Retaining Nut - Inspection AD/PDH/2\n\nModel 3/1000/2 - Hub Inspection AD/PDH/3\n\nModel 4/4000/6 Blade - Modification AD/PDH/4\n\nBracket Type Propellers - Inspection AD/PDH/5 Amdt 3\n\nBracket Type Propellers - Modification AD/PDH/6\n\nBarrel Support Blocks - Modification AD/PDH/7\n\nOil Transfer Tube Locking - Modification AD/PDH/8","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope not changed. The instrument explicitly revokes listed ADs and remakes them \"in exactly the same form\" as their latest published editions, preserving existing obligations; the action is administrative rather than substantive (see operative paragraphs and the Note)."},"complexity_factors":["Procedural nature: simple revocation and reissuance under subregulation 39.001(1) (text: \"acting under subregulation 39.001 (1)\")","Multiple separate instruments: nine named ADs listed in Schedule 1 must be remade individually (Schedule 1 list)","No substantive change claim: each attached AD is remade \"in exactly the same form as appears in the latest published edition\" (Note in instrument)","Operational compliance burden remains: owners/operators/maintenance organisations must continue to follow inspections, modifications and other requirements in each AD (effect implied by reissuance)","Reliance on attachments: the instrument depends on the attached AD texts for technical requirements (instrument attaches ADs)","Potential for administrative confusion during transition from old to re‑made instruments (practical implementation risk)"],"plain_english_summary":"This instrument revokes the Airworthiness Directives listed in Schedule 1 and reissues each one as a separate directive in the same form as their latest published editions. It is made by a Civil Aviation Safety Authority delegate under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998. It affects owners, operators and maintenance organisations of the specified De Havilland variable‑pitch propellers, who remain obliged to comply with the inspections, modifications and other measures set out in those re‑made directives and to bear associated costs."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument maintains identical scope to the original directives. The explicit note states each directive is 're-made in exactly the same form as appears in the latest published edition.' This is pure procedural remaking without expansion of scope."},"complexity_factors":["Very short instrument (under 300 words)","Only 1 defined term implicitly used ('Airworthiness Directive')","Simple binary structure: revoke (a) and remake (b)","No conditional logic or exceptions","Cross-reference only to enabling regulation (subregulation 39.001(1)) and internal Schedule 1","Schedule contains simple tabular list of 8 items with 2 columns each","No substantive legal drafting — purely procedural remaking instrument"],"plain_english_summary":"This instrument revokes eight existing airworthiness directives for certain De Havilland variable-pitch propellers and immediately reissues them as new, separate legal instruments. The remade directives are identical to the originals, so there are no changes to the safety requirements.\n\nIt mainly affects owners/operators, maintenance engineers, and CASA; it’s a legal housekeeping step to keep the directives current and properly formatted under present regulations."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-de-havilland","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-de-havilland/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-de-havilland/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-de-havilland/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-de-havilland/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-de-havilland/documents"}}