{"id":"F2006B07991","name":"Airworthiness Directives 2004 - Revocation and Remaking - Propellers - Variable Pitch - Hartzell","slug":"airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-hartzell","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115044,"registerId":"commonwealth-F2006B07991-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 - Hartzell","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 - Hartzell\n\nAD Name AD Number\n\nCANCELLED AD/PHZL/1\n\nCANCELLED AD/PHZL/2\n\nBlade Retaining Split Ring - Replacement - CANCELLED AD/PHZL/3\n\nBlade Retaining Split Ring - Replacement and Life Limitation - CANCELLED AD/PHZL/4\n\nPiston Jack Assembly P/N B-804 - Replacement - CANCELLED AD/PHZL/5\n\nLink Screw P/N AN501-A10-6 Replacement - CANCELLED AD/PHZL/6\n\nGuide Collar - Replacement and Inspection - CANCELLED AD/PHZL/7\n\nHub Spider - Replacement AD/PHZL/8\n\nCANCELLED AD/PHZL/9 Amdt 1\n\nCANCELLED AD/PHZL/10\n\nPropeller Mounting Bolt - Inspection and Modification - CANCELLED AD/PHZL/11\n\nCANCELLED AD/PHZL/12\n\nCANCELLED AD/PHZL/13\n\nBlade and Hub - Shot Peening AD/PHZL/14 Amdt 4\n\nRelief Valve Springs - Replacement - CANCELLED AD/PHZL/15\n\nPitch Change Block - Inspection and Modification - CANCELLED AD/PHZL/16\n\nBearing Inspection - CANCELLED AD/PHZL/17 Amdt 1\n\nPropeller Blade Clamp - Inspection - CANCELLED AD/PHZL/18\n\nCarbon Block Assembly - Modification - CANCELLED AD/PHZL/19\n\nSpinner Bulkhead - Modification - CANCELLED AD/PHZL/20\n\nPropeller Blade Shank - Inspection - CANCELLED AD/PHZL/21 Amdt 1\n\nPropeller Blade Bearing - Inspection - CANCELLED AD/PHZL/22 Amdt 2\n\nBlade Shank - Inspection and Modification AD/PHZL/23 Amdt 5\n\nPropeller Attachment - Modification and Inspection AD/PHZL/24\n\nBlade Shank - Inspection - CANCELLED AD/PHZL/25 Amdt 2\n\nBlade Shank - Inspection - CANCELLED AD/PHZL/26\n\nSUPERSEDED AD/PHZL/27\n\nPropeller Blade - Replacement - CANCELLED AD/PHZL/28 Amdt 1\n\nSUPERSEDED AD/PHZL/29 Amdt 1\n\n  \nPitch Change Knob Bushing - Replacement - CANCELLED AD/PHZL/30\n\nSUPERSEDED AD/PHZL/31 Amdt 1\n\nPropeller Modification - Installation of Spring Back-up Kit AD/PHZL/32\n\nPitch Change Forks - Shot Peening - CANCELLED AD/PHZL/33\n\nSUPERSEDED AD/PHZL/34\n\nShank Blade - Replacement - CANCELLED AD/PHZL/35\n\nPropeller Blade - Inspection and Modification of Balance Cavity - CANCELLED AD/PHZL/36 Amdt 2\n\nHard Alloy Blades - Inspection AD/PHZL/37\n\nY Shank Blade - Inspection and Replacement - CANCELLED AD/PHZL/38\n\nPropeller Damper - Replacement AD/PHZL/39 Amdt 1\n\nPropeller Blade - Replacement - CANCELLED AD/PHZL/40\n\nPropeller Blade Shank Bearing Radius - Inspection - CANCELLED AD/PHZL/41\n\nPropeller Feather Assist Spring Kit AD/PHZL/42 Amdt 5\n\nSingle Shoulder Aluminium Blades - CANCELLED AD/PHZL/43 Amdt 10\n\nPropeller Attachment Bolts AD/PHZL/44 Amdt 8\n\nPropeller Hub Pilot Tubes - Replacement - CANCELLED AD/PHZL/45\n\nPropeller De-Icer System Slip Ring - Inspection AD/PHZL/46 Amdt 2\n\nPropeller Blades TL10282 ( ) ( ) + 4 or LT10282 ( ) ( ) + 4 - Retirement - AD/PHZL/47 Amdt 1\n\nPropeller Blade Pilot Tube Bore - CANCELLED AD/PHZL/48 Amdt 6\n\nT10282 Blades (Hard Alloy) - CANCELLED AD/PHZL/49 Amdt 3\n\nA-4025 Spring Retainer - Inspection AD/PHZL/50\n\nPropeller Attach Bolts - CANCELLED AD/PHZL/51\n\nPropeller Blade Separation - CANCELLED AD/PHZL/52 Amdt 2\n\nBlade Clamps AD/PHZL/53 Amdt 2\n\nHard Alloy Propeller Blades AD/PHZL/54\n\nPilot Tubes - CANCELLED AD/PHZL/55 Amdt 1\n\nPitch Change Rod AD/PHZL/56\n\nBlade Tip Stalling AD/PHZL/57 Amdt 2\n\nPiston Nut B474 AD/PHZL/58\n\nTwo Blade Y Shank Aluminium Hub - CANCELLED AD/PHZL/59 Amdt 4\n\nThree Bladed Y Shank Aluminium Hubs AD/PHZL/60 Amdt 4\n\nMounting Studs - CANCELLED AD/PHZL/61\n\nPropeller Blade Pilot Tube Bore AD/PHZL/62 Amdt 4\n\nPropeller Blade Bore - CANCELLED AD/PHZL/63 Amdt 1\n\nHub Pilot Tube Bore AD/PHZL/64 Amdt 2\n\nHub Pilot Tube Bore Inspection AD/PHZL/65\n\n  \nBlade Pitch Change Knob AD/PHZL/66\n\nPropeller Blade Cracking AD/PHZL/67\n\nTurbine Engine; Steel Hub Propellers AD/PHZL/68 Amdt 2\n\nHartzell X and V Shank Propellers AD/PHZL/69 Amdt 2\n\nHard Alloy Blades - Removal AD/PHZL/70\n\nCounterweight Clamp Bolts AD/PHZL/71\n\nCounterweight Clamp Bolt Hole AD/PHZL/72\n\nDiscrepant Y Shank Propellers AD/PHZL/73\n\nTwo Blade 'Y' Shank Aluminium Hub AD/PHZL/74 Amdt 1\n\nPropeller Hub Replacement AD/PHZL/75\n\nHC-C2YR-4CF Propeller Life Reduction AD/PHZL/76\n\nAustralian Air Props AD/PHZL/77 Amdt 2\n\nAnti-ice boots AD/PHZL/78\n\nPropeller Vibration Placard AD/PHZL/79 Amdt 1\n\nComposite Blades Cracking AD/PHZL/80","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument does not change substantive scope or technical requirements. It revokes listed ADs and remakes each in exactly the same form as the latest published editions (source: instrument note and operative paragraph), so affected obligations and compliance responsibilities remain unchanged."},"complexity_factors":["Administrative action: the instrument revokes then reissues existing ADs without substantive amendment (source: note and main text).","Number of instruments involved: a long Schedule 1 listing many ADs increases logistical/record‑keeping work for operators and regulators.","Legal authority: exercise of delegated power under subregulation 39.001(1) CASR 1998 (source: instrument header).","Attachments replicate latest published ADs exactly, reducing interpretive complexity but creating an administrative burden to track republished instruments.","Limited regulatory discretion in the text: delegate performs republishing rather than altering safety requirements, so legal interpretation remains straightforward."],"plain_english_summary":"This instrument, signed by a CASA delegate under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998, revokes a list of Hartzell variable‑pitch propeller Airworthiness Directives (ADs) and reissues each one as a separate instrument in the same form as their latest published editions. It affects aircraft owners, operators and maintenance organisations using the listed Hartzell propellers: the same mandatory AD requirements continue to apply and those parties bear any compliance and maintenance costs."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This instrument performs pure administrative consolidation. The note explicitly states each attached AD is 're-made in exactly the same form as appears in the latest published edition.' No expansion of regulatory scope; purely procedural housekeeping to update the legal instrument status under the Civil Aviation Safety Regulations 1998 framework."},"complexity_factors":["Extensive cross-referencing to 80 separate Airworthiness Directives, each with their own amendment history (e.g., 'Amdt 4', 'Amdt 5')","Multiple status categories requiring interpretation: CANCELLED, SUPERSEDED, and active (unmarked) ADs","Relies on external technical documents — the actual substantive requirements are in attached ADs not reproduced in full","Assumes knowledge of aviation technical terminology (e.g., 'shot peening', 'pitch change block', 'feather assist spring')","Nested legal mechanism: instrument revokes and remakes under delegated authority, with note clarifying no substantive change","Schedule 1 table format requires horizontal parsing of three columns (AD Name, AD Number, Status) across 80 entries"],"plain_english_summary":"This instrument tidies up the legal status of safety rules for Hartzell variable‑pitch propellers by revoking 80 old Airworthiness Directives and reissuing many of them as fresh, standalone legal instruments without changing their technical content. \n\nIt matters to aircraft owners, operators, licensed maintenance engineers and CASA because the ADs are legally binding: compliance remains required for affected Hartzell propellers, while some ADs are cancelled, some superseded, and others formally refreshed."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-hartzell","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-hartzell/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-hartzell/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-hartzell/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-hartzell/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-propellers-variable-pitch-hartzell/documents"}}