{"id":"F2006B07827","name":"Airworthiness Directives 2004 - Revocation and Remaking - DH 104 (Dove) Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-dh-104-dove-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50729,"registerId":"commonwealth-F2006B07827-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 - DH 104 (Dove) Series Aeroplanes","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\nDH 104 (Dove) Series Aeroplanes\n\nAD Name AD Number\n\nFire Protection Modifications - Engine Nacelles AD/DH 104/1\n\nSiebe Gorman Safety Belt - Modification AD/DH 104/2\n\nWing Root Main Spar Lower Joint - Modification AD/DH 104/3\n\nAileron Differential Pulley Stud - Modification AD/DH 104/4\n\nWing and Centre Section Lower Spar Booms - Safe Lives AD/DH 104/5 Amdt 6\n\nEngine Mount Attachment Brackets - Inspection AD/DH 104/6 Amdt 1\n\nFuselage - Inspection AD/DH 104/7\n\nFin Attachment Brackets - Inspection AD/DH 104/8 Amdt 1\n\nAileron, Rudder and Elevator Hinge Links and Brackets and Tailplane Upper AD/DH 104/9\n\nMainplane Upper and Lower Spar Booms - Inspection AD/DH 104/10 Amdt 1\n\nEngine Instrument Arrangement - Modification AD/DH 104/11\n\nOuter Mainplane - Inspection AD/DH 104/12 Amdt 2\n\nCrossed Aileron Control Cables - Inspection AD/DH 104/13\n\nWing/Fuselage Lower Main Root Joint - Inspection AD/DH 104/14 Amdt 3\n\nWing Lower Root Joint Fittings P/Nos. 4W 271 and 4W 5013 - Inspection AD/DH 104/15 Amdt 2\n\nFlap System Modification to Prevent Crossing of Pneumatic Lines AD/DH 104/16\n\nAileron Lever - 4WA315 - Inspection and Modification AD/DH 104/17 Amdt 2\n\nTrim Tab Connecting Rod Eye End AD/DH 104/18 Amdt 1\n\nEngine Mounting Frames - Inspection AD/DH 104/19 Amdt 1\n\nLanding Gear Actuator Pistons - Inspections and Replacement AD/DH 104/20\n\nCANCELLED AD/DH 104/21\n\nCANCELLED AD/DH 104/22\n\nCANCELLED AD/DH 104/23\n\nFlap Datum Hinge Safety Washer - Inspection AD/DH 104/24\n\nFlap Datum Hinge Assembly - Inspection AD/DH 104/25 Amdt 1\n\nRudder Control Pedal Reversal Lever - Inspection AD/DH 104/26\n\nPneumatic System - Main Air Reservoirs AD/DH 104/27\n\nEngine Mounting Attachment Fittings - Inspection AD/DH 104/28\n\nEngine Mounting Frame - Inspection AD/DH 104/29\n\n  \nFront Seat Restraint Installation - Modification AD/DH 104/30\n\nDrag Bracing Member, Centre Section Spar Lower Boom - Inspection and AD/DH 104/31\n\nMain and Nose Undercarriage Radius Rod Adjusting Screws - Replacement AD/DH 104/32\n\nNose Undercarriage Inner Casing - Inspection and Replacement AD/DH 104/33\n\nCentre Section Main Spar Top and Bottom Boom Joint - Inspection AD/DH 104/34 Amdt 2\n\nAircraft Life Extension AD/DH 104/35 Amdt 1\n\nEngine Mounting Frame Front Engine Support Spigots - Inspection AD/DH 104/36\n\nAileron Mass Balance Weight Assembly AD/DH 104/37\n\nFlap To Flap Jack Connecting Pin AD/DH 104/38","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument does not change the substantive scope or technical requirements of the listed ADs. It expressly revokes and remakes each AD \"in exactly the same form\" as the latest published edition (Schedule 1 and accompanying note), so obligations on operators remain unchanged; the change is procedural/administrative (format and instrument status) rather than substantive."},"complexity_factors":["Administrative rather than substantive change: ADs are revoked and remade identically (note: \"in exactly the same form\").","Wide list of specific ADs affected (many entries in Schedule 1), increasing tracking and document-management burden for operators.","Legal basis reference: action taken under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998, so effect depends on that delegated power.","Presence of amendment markers (e.g. \"Amdt 1\", \"Amdt 2\") and cancelled entries in the Schedule requires careful cross-checking of current versions.","Operational compliance remains with aircraft owners/operators and maintenance organisations — continuing costs for inspections, modifications or replacements set by the ADs themselves.","Re-issuance as separate instruments may create short-term administrative confusion about which instrument is the operative AD until records are updated."],"plain_english_summary":"This instrument revokes a list of Airworthiness Directives (ADs) applying to DH 104 (Dove) series aeroplanes and reissues each AD as a separate instrument under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998. It reproduces the ADs \"in exactly the same form\" as the latest published editions. Owners, operators and maintenance organisations for DH 104 aircraft remain bound to comply; the measure mainly reorganises the legal form of existing ADs rather than changing technical requirements."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument explicitly states it remakes each AD \"in exactly the same form as appears in the latest published edition.\" This is a pure re-authorisation exercise with no expansion of scope, new requirements, or policy changes. The three cancelled ADs (21-23) are the only removals, representing a slight narrowing rather than expansion."},"complexity_factors":["Single operative provision with straightforward binary action (revoke and remake)","No defined terms section—all technical terms reference external aviation engineering standards","No conditional logic or nested exceptions in the instrument itself","Complexity resides entirely in the 38 attached ADs (not reproduced in full), which contain detailed engineering specifications","Simple tabular schedule format listing directive numbers and descriptive titles only","Cross-references limited to subregulation 39.001(1) of the CASR 1998 (standard empowering provision)"],"plain_english_summary":"This instrument revokes and immediately remakes 38 Airworthiness Directives for the de Havilland DH 104 Dove, keeping their technical requirements unchanged. CASA is refreshing the legal status of these mandatory safety rules rather than letting them lapse.\n\nIt affects owners, operators, maintenance organisations and pilots of these vintage Doves by preserving enforceable inspections, life limits, modifications and replacements needed to keep the aircraft airworthy. Three ADs (21–23) remain cancelled."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-104-dove-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-104-dove-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-104-dove-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-104-dove-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-104-dove-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-dh-104-dove-series-aeroplanes/documents"}}