{"id":"F2006B07988","name":"Airworthiness Directives 2004 - Revocation and Remaking - Propellers - Variable Pitch - Dowty Rotol","slug":"airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-dowty-rotol","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115039,"registerId":"commonwealth-F2006B07988-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 - Dowty Rotol","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 - Dowty Rotol\n\nAD Name AD Number\n\nPitch Lock Cylinder - Modification AD/PR/1\n\nPropeller Blade - Rework AD/PR/2 Amdt 1\n\nPitch Lock Support Sleeve - Modification AD/PR/3\n\nApplication of Pre-Primer to Propeller Blades AD/PR/4\n\nPropeller Cylinder - Inspection - CANCELLED AD/PR/5 Amdt 2\n\nRetirement Lives of Components AD/PR/6 Amdt 12\n\nOperating Cylinder - Replacement AD/PR/7\n\nHub Driving Centre - Modification AD/PR/8\n\nHub Driving Centre - Inspection AD/PR/9\n\nBlade Retaining Bolts - Inspection - CANCELLED AD/PR/10\n\nBlade Operating Pin - Inspection for Cracking AD/PR/11 Amdt 1\n\nBlade Eyebolt and Operating Link Group - Inspection and/or Rework AD/PR/12\n\nPitch Lock Assembly - Modification AD/PR/13\n\nBlade Retaining Bolt Locking Segment - Replacement AD/PR/14\n\nBlade Bearings - Overhaul Procedures AD/PR/15\n\nInspection of Hub Driving Centres for Incorrect Machining During Modification AD/PR/16 Amdt 1\n\nHub Driving Centre Flange - Inspection AD/PR/17\n\nHub and Driving Centre Assembly - Inspection of Cadmium Plating AD/PR/18\n\nPropeller Blade Corrosion - Inspection and Repair AD/PR/19 Amdt 1\n\nHub Front Face to Snout Radius - Inspection AD/PR/20\n\nHub Assembly - Inspection of Blade Sockets AD/PR/21\n\nPitch Lock Cylinder and Support Sleeves - Inspection AD/PR/22\n\nFeathering Springs - Operational Inspection AD/PR/23\n\nBeta Tube AD/PR/24 Amdt 6\n\nHub Wall Cracking AD/PR/25 Amdt 9\n\nFront Wall/Snout Radius Cracking AD/PR/26 Amdt 1\n\nBeta Tube AD/PR/27 Amdt 1\n\nHub Switches AD/PR/28 Amdt 1\n\nOperating Cylinder Retaining Bolts AD/PR/29 Amdt 5\n\n  \nHub Mounting Face Dowel Inspection Following Propeller Overtorque - AD/PR/30\n\nPropeller Blade Bearings - CANCELLED AD/PR/31\n\nBlade Pitch Seizure AD/PR/32\n\nHub Assembly AD/PR/33 Amdt 2\n\nHub Through Bolts AD/PR/34 Amdt 1\n\nPropeller Hub Wall Cracking AD/PR/35 Amdt 2","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive requirements of the listed Airworthiness Directives. It revokes the listed ADs and re-makes each as a separate instrument, explicitly stating they are re-issued 'in exactly the same form' as the latest published edition (source: operative paragraphs and Note). The change is administrative (publication/citation/record-keeping) rather than substantive."},"complexity_factors":["Delegation and legal authority: instrument is made under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998 (source line: instrument heading and first paragraph).","Large list of affected ADs: Schedule 1 lists many separate ADs across inspections, modifications and replacements (source: Schedule 1).","Amendment history varies: listed ADs include multiple amendment numbers (e.g. Amdt 12, Amdt 9) requiring attention to versioning when reissued (source: Schedule 1).","Presence of CANCELLED entries: some listed ADs are marked 'CANCELLED', which can complicate interpretation of which instruments remain operative (source: Schedule 1).","Administrative, not substantive, change: note states each AD is re-made 'in exactly the same form' as the latest published edition, so substantive requirements are preserved but legal citation and record-keeping change (source: Note).","Potential for transitional confusion: moving from a consolidated to multiple separate instruments may affect how operators locate, cite and comply with specific ADs (implied by revocation and re-making mechanics)."],"plain_english_summary":"This instrument revokes a list of Dowty Rotol variable-pitch propeller Airworthiness Directives (ADs) and re-issues each one as a separate CASA instrument under subregulation 39.001(1). It affects aircraft owners, operators, maintenance organisations and continuing-airworthiness managers responsible for aircraft fitted with these propellers by keeping the existing mandatory AD requirements in force while changing how each AD is published and cited. The re-issued ADs are stated to be identical in substance to their latest published forms."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument maintains the exact same scope as the original ADs. The note explicitly states each directive is being re-made \"in exactly the same form as appears in the latest published edition.\" This is a procedural consolidation exercise, not an expansion of regulatory scope."},"complexity_factors":["Single, clear purpose: revocation and remaking of existing instruments","No defined terms section — relies on external understanding of \"Airworthiness Directive\" and \"Schedule\"","Minimal conditional logic — straightforward (a) and (b) structure under one regulation reference","Heavy reliance on external documents — the actual substantive requirements are in the attached ADs, not in this instrument itself","Tabular schedule of 35 items creates length but not conceptual complexity","Only one legislative cross-reference (subregulation 39.001(1) of CASR 1998)"],"plain_english_summary":"This instrument revokes 35 existing Airworthiness Directives and reissues them as fresh, separate legal instruments without changing their content, preserving the current mandatory maintenance and inspection obligations for Dowty Rotol variable‑pitch propellers. It affects aircraft owners/operators, licensed maintenance engineers/organisations, and CASA by tidying the legal status of those ADs so they remain enforceable; three ADs (AD/PR/5, AD/PR/10, AD/PR/31) are marked cancelled and no longer apply."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-dowty-rotol","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-dowty-rotol/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-dowty-rotol/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-dowty-rotol/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-dowty-rotol/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-dowty-rotol/documents"}}