{"id":"F2006B07906","name":"Airworthiness Directives 2004 - Revocation and Remaking - Instruments and Automatic Pilots","slug":"airworthiness-directives-2004-revocation-and-remaking-instruments-and-automatic-pilots","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":50931,"registerId":"commonwealth-F2006B07906-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 - Instruments and Automatic Pilots","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\nInstruments and Automatic Pilots\n\nAD Name AD Number\n\nGyro Horizon Indicators Power Failure Warning Flag - Modification AD/INST/1\n\nEdison and Garwin Engine Gauge Units - Modification AD/INST/2 Amdt 2\n\nBendix Fuel Flow Transmitters - Inspection AD/INST/3\n\nVacuum Pump Splined Coupling - Replacement AD/INST/4 Amdt 1\n\nFuel Contents Gauges - Tank Unit - Inspection and Modification AD/INST/5 Amdt 1\n\nEddison Engine Gauge Units - Modification - CANCELLED AD/INST/6 Amdt 2\n\nH14 Automatic Pilot Servo Housing - Inspection AD/INST/7\n\nInstruments in VFR Aircraft AD/INST/8 Amdt 4\n\nInstruments in IFR Aircraft - Test Requirements AD/INST/9 Amdt 6\n\nMechanisms Ltd. Fatigue Meter AD/INST/10 Amdt 1\n\nAutomatic Pilot Servo Actuators - Inspection AD/INST/11\n\nSEP 6 Automatic Pilot Roll Computer Clutch Circuit - Modification AD/INST/12\n\nVenting of SEP 2 Servomotor Clutches - Modification AD/INST/13\n\nSEP 6 Automatic Pilot Pitch Computer Clutch Circuit - Modification AD/INST/14\n\nAP106 Automatic Pilot Gain Programmer Type 161H-1 - Modification AD/INST/15\n\nKing KG 102 Directional Gyro - Modification AD/INST/16\n\nKing K1 525 Indicator - Modification AD/INST/17\n\nCollins PN-101 Pictorial Navigation System Slaving Accessory 328A-3G - AD/INST/18\n\nARC PA 500A Actuators - Cessna Auto Pilot!! AFCS & Yaw Damper - AD/INST/19\n\nSep 2 Automatic Pilot Trim Servomotor Venting - Modification AD/INST/20\n\nKing KFC200 - IAFCS - Bridle Cable Clamps - Inspection AD/INST/21\n\nAirborne Vacuum Pumps - Removal From Service AD/INST/22\n\nEdo-Aire Mitchell NSD-360 Compass System - Addition of Nav Flag Adapter AD/INST/23 Amdt 1\n\nFilotecnica Salmoiraghi Airspeed Indicators - Calibration Tests AD/INST/24\n\nrosonic Encoding Altimeters - Replacement AD/INST/25\n\nNavomatic 200A Automatic Pilot Computer - Amplifier Nav Input - Modification AD/INST/26\n\nAirborne Vacuum Pumps - Removal From Service AD/INST/27\n\nA.R.C. PA1050A Actuator and DA-1050A Decoupler Adapter - Cessna 1050A AD/INST/28\n\nBendix M-4 (A!!B!!C!!D) Automatic Flight Control System Servo - Inspection AD/INST/29\n\n  \nKing KAP 100/KAP 150/KFC 150 Flight Control System AD/INST/30\n\nAirborne Vacuum Pumps - Removal from Service AD/INST/31\n\nAltimeters AD/INST/32\n\nKing KAP/KFC 200 Autopilot AD/INST/33 Amdt 1\n\nHoneywell SP-300 DFCS Mode Control Panel AD/INST/34\n\nCollins APP-80/80A Autopilot Panel AD/INST/35\n\nCollins ALI-80( ) Barometric Altimeter AD/INST/36\n\nAltitude Preselector/Alerter AD/INST/37\n\nLITEF GmbH LCR-88 Attitude and Heading Reference System AD/INST/38\n\nAltimeters Manufactured By CATIC AD/INST/39\n\nLITEF Attitude Heading Reference System AD/INST/40\n\nRAPCO Inline Pressure Filter AD/INST/41\n\nKSA 470 Autopilot Servo Actuator AD/INST/42\n\nParker Hannifin Flexible Coupling AD/INST/43\n\nKAP 140 and KFC 225 Autopilot Systems AD/INST/44\n\nHoneywell Air Data Inertial Reference Units AD/INST/45\n\nSVS III Standby Vacuum System AD/INST/46\n\nKC 225 AFCS AD/INST/47 Amdt 1\n\nHoneywell Inertial Reference Unit AD/INST/48\n\nRockwell Collins Air Data Computers AD/INST/49 Amdt 1\n\nAdaptive Flight Display AD/INST/50\n\nFlight Management Computers AD/INST/51","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument is administrative: it revokes and re-issues the listed Airworthiness Directives \"in exactly the same form\" as their latest published editions. It does not broaden or narrow the technical obligations imposed by the ADs. The scope of regulatory obligations on operators and maintainers therefore remains unchanged; the instrument changes only the form and citation of the instruments (administrative scope), not the substance of the safety requirements."},"complexity_factors":["Single statutory power invoked: subregulation 39.001(1) (simple enabling provision)","Two operative actions only: revoke listed ADs (para a) and re-make them as separate instruments (para b)","Schedule 1 lists 51 Airworthiness Directives (AD/INST/1 through AD/INST/51) — a large number of items to reissue","Each re-made AD is attached as a separate instrument (attachments increase administrative and publication steps)","Note indicates re-made ADs are identical to latest published editions — no substantive amendment but potential record-keeping effects","Minimal defined terms and limited cross-referencing within the instrument itself","Potential external cross-references to the original AD publications and CASA databases (not contained in the instrument) which could create short-term lookup complexity"],"plain_english_summary":"**What this instrument does, in plain language**\n\n- This is an administrative action by a delegate of the Civil Aviation Safety Authority (CASA) made under subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998.  \n- It does two things (see paragraphs (a) and (b)): it revokes (cancels) the Airworthiness Directives listed in Schedule 1, and immediately re-makes each of those Airworthiness Directives as separate instruments attached to this instrument.  \n- The attached note says each re-made Directive is reproduced exactly as it appears in the latest published edition of the Directive — so the wording and technical requirements of the Directives are not changed by this instrument.\n\n**Who is affected**\n\n- Aircraft operators, owners, maintainers and maintenance organisations that are subject to the listed Airworthiness Directives (ADs). Those ADs set mandatory inspection, modification, removal-from-service and other technical obligations for specific instruments, autopilot components and related equipment.  \n- Manufacturers and parts suppliers to the extent ADs require parts, modifications or replacements.  \n- CASA and its delegates, because the instrument changes how these ADs are recorded and issued (as separate instruments rather than as entries in a consolidated list).\n\n**Why it matters (mechanics and practical effect)**\n\n- Mechanically, the instrument does not change the substance of the listed ADs: it revokes the old instruments and issues fresh, identical instruments for each listed AD. The technical obligations imposed by the ADs (inspections, replacements, modifications, etc.) remain in force as they were.  \n- Practically, re-making each AD as a separate instrument can affect record-keeping, how each AD is individually cited, amended or revoked in future, and how operators locate the operative text. It may make future amendment or repeal of individual ADs administratively simpler because each AD exists as a stand-alone instrument.\n\n**Official rationale and a reality test**\n\n- The instrument’s stated effect (in the Note) is administrative: to reproduce the ADs \"in exactly the same form\" as the latest published editions. That is a claim about process, not about changing technical requirements.  \n- Costs and incentives: because the substantive obligations do not change, there is no new compliance cost imposed on aircraft operators beyond what the existing ADs already required. The main costs are administrative: CASA must prepare and publish separate instruments; operators may need to update document systems to point to the newly issued, separately numbered ADs.  \n- Trade-offs and opportunity cost: CASA spends staff time on the re-issuance and publication; that time could have been used on different regulatory work. For operators, the only potential cost is the time to reconcile records; the benefit is clearer citation and easier tracking of individual ADs.  \n- Implementation risk and compliance burden: low on substance (no new inspection/maintenance requirements), moderate on administration (possible short-term confusion if record systems or compliance tools reference the old consolidated AD list rather than the new separate instruments).  \n- Bureaucratic discretion: the delegate exercises an existing statutory power to make or revoke ADs. The instrument is an exercise of that delegated rule-making power; the substance of the ADs remains unchanged by this exercise.\n\n**Effects on private enterprise, markets and choices**\n\n- Competition and prices: negligible direct effect. ADs may require parts or services from particular suppliers; because the technical content is unchanged, any market impacts remain the same as before.  \n- Productivity and contract freedom: operators retain the same maintenance obligations and the same freedom to contract for compliance services as before. Administrative re-issuance could marginally affect transaction costs (document updating) but not operational choices.  \n- Concentrated benefits and diffuse costs: the administrative clarity from separate instruments is a concentrated procedural benefit to CASA, maintenance record-keepers and legal drafters. Any costs (time to update records) are diffuse across many operators. There is no clear mechanism in the text for rent-seeking or capture from the change; the instrument reproduces existing technical mandates rather than creating new supplier preferences.\n\n**Who pays, who decides, and what changes in behaviour**\n\n- Who decides: a CASA delegate exercising power under subregulation 39.001(1) decides to revoke and re-make these ADs (see instrument text, paragraphs (a) and (b)).  \n- Who pays: no new substantive costs are imposed on operators by this instrument. Existing obligations under each AD remain payable in the usual way (costs of inspections, parts and labour where the AD requires them). Administrative costs of updating records and compliance systems fall to operators and maintenance organisations. CASA bears the administrative cost of preparing and publishing the separate instruments.  \n- Behaviour changes: no change to technical compliance behaviour is required. The principal behavioural change is administrative: operators and maintainers may need to update references in maintenance manuals, compliance databases and internal checklists to cite the re-issued, separately numbered ADs.\n\n**Concrete legal references in the instrument**\n\n- Legal power used: subregulation 39.001(1) of the Civil Aviation Safety Regulations 1998 (as cited in the instrument).  \n- Operative steps: paragraph (a) revokes the ADs listed in Schedule 1; paragraph (b) re-makes each listed AD as a separate instrument and attaches them.  \n- Effect on content: the Note states the re-made ADs are exactly the same as the latest published editions — indicating no substantive amendment is being made by this instrument.\n\nOverall conclusion (neutral): this instrument is administrative housekeeping that re-issues a large set of existing Airworthiness Directives as individual instruments. It does not change the substantive maintenance, inspection or modification obligations imposed by those ADs, but it alters how they are recorded, cited and managed administratively."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a pure consolidation/remaking instrument with no expansion of scope. The note explicitly states each directive is re-made 'in exactly the same form' as previously published. The scope remains limited to the 51 specific instruments and automatic pilot systems listed in Schedule 1."},"complexity_factors":["Very short substantive text (approximately 200 words of operative provisions)","Simple binary structure: revoke (a) and remake (b) — no conditional logic or nested exceptions","No defined terms section — relies entirely on external references to the Civil Aviation Safety Regulations 1998","Schedule 1 is a straightforward table with only 3 columns (AD Name, AD Number, and descriptive title)","No cross-references within the instrument itself — all substantive content is in the attached directives (not reproduced here)","Single delegation chain (subregulation 39.001(1)) with no alternative pathways","Explicit note confirming no substantive change ('re-made in exactly the same form')"],"plain_english_summary":"This CASA order cancels 51 existing Airworthiness Directives for instruments and autopilots and reissues each as a separate legal instrument, keeping their content unchanged. It’s an administrative repeal-and-remake to preserve the directives’ legal effect without altering safety requirements.\n\nIt affects Australian aircraft owners/operators, maintenance organisations, and parts manufacturers/suppliers by ensuring these mandatory safety instructions remain enforceable."},"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-instruments-and-automatic-pilots","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-instruments-and-automatic-pilots/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-instruments-and-automatic-pilots/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-instruments-and-automatic-pilots/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-instruments-and-automatic-pilots/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-instruments-and-automatic-pilots/documents"}}