{"id":"F2006B07943","name":"Airworthiness Directives 2004 - Revocation and Remaking - Piaggio P166 Series Aeroplanes","slug":"airworthiness-directives-2004-revocation-and-remaking-piaggio-p166-series-aeroplanes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51012,"registerId":"commonwealth-F2006B07943-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 - Piaggio P166 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\nPiaggio P166 Series Aeroplanes\n\nAD Name AD Number\n\nTeleflex Rods for Engine Controls - Protection AD/P166/1\n\nEngine Oil System Piping - Re-Routing AD/P166/2\n\nFuel System in Engine Compartment - Modification AD/P166/3\n\nDrain Well for Fuel Tanks - Increased Capacity AD/P166/4\n\nEngine Nacelle - Drainage Modification AD/P166/5\n\nFire Detection System - Modification AD/P166/6\n\nElectrical Supply - Turn and Bank Indicator, Fire Warning System and Stall AD/P166/7\n\nEmergency Electrical Bus - Modification AD/P166/8\n\nGenerator Circuit - Modification AD/P166/9\n\nUndercarriage Warning Horn Circuit - Modification AD/P166/10\n\nMain Landing Gear Retracting Jack Stem - Installation of Washer AD/P166/11\n\nElevator Trim Tab Inner Hinge - Modification AD/P166/12\n\nHydraulic Pressure Switch - Provision of Guards AD/P166/13\n\nNose Landing Gear Shock Absorber Mount Sleeves - Replacement AD/P166/14\n\nCANCELLED AD/P166/15\n\nElevator Trim Drum - Inspection and Modification AD/P166/16\n\nAngle Bar at Fuselage Frame 20 - Inspection and Modification AD/P166/17\n\nSuperseded by AD/P166/21 - CANCELLED AD/P166/18\n\nCarburettor Air Mixer Valve - Inspection and Modification AD/P166/19\n\nHydraulic Pressure Gauges - Replacement AD/P166/20\n\nMain Landing Gear Shock Absorber Strut - Modification AD/P166/21\n\nNose Wheel Door Levers - Modification AD/P166/22\n\nMain Landing Gear Jack Lock - Modification AD/P166/23\n\nNose Landing Gear Retraction Jack Brake Valve - Modification AD/P166/24\n\nNose Landing Gear Steering Control Flange - Modification AD/P166/25\n\nEngine and Propeller Installation Teleflex Controls - Modification AD/P166/26\n\nMagnetic Compass Installation - Modification AD/P166/27\n\nFlap Control Bellcrank - Modification AD/P166/28 Amdt 1\n\nFlap Hinge Attachment At Rib No. 13 AD/P166/29\n\n  \nNose Wheel Steering - Inspection and Modification AD/P166/30\n\nMain Landing Gear Retraction Jack Pivot - Modification AD/P166/31\n\nFlap Actuating Cylinder Attachment Bracket - Inspection AD/P166/32\n\nEngine and Propeller Teleflex Controls - Inspection and Modification AD/P166/33\n\nLanding Gear Selector Valve - Modification AD/P166/34\n\nFront Seat Restraint Installations - Modification AD/P166/35","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument performs a purely administrative function: revocation and remaking of existing Airworthiness Directives in a different legislative format. The scope remains identical to the original ADs — no new aircraft types added, no new safety requirements introduced, no existing requirements removed. The note explicitly states each AD is re-made 'in exactly the same form' as previously published."},"complexity_factors":["Single operative provision with straightforward (a)/(b) structure","No defined terms section — relies on external knowledge of 'Airworthiness Directive' and 'Civil Aviation Safety Regulations 1998'","Schedule 1 is a simple table listing 35 ADs by name and number","Two entries marked 'CANCELLED' and one 'Superseded' — minor conditional status indicators","Cross-reference to subregulation 39.001(1) of CASR 1998 (external, not internal)","No substantive technical detail in the instrument itself — all technical content attached as separate documents","Extremely short — approximately 400 words of operative text plus table"],"plain_english_summary":"CASA revokes 35 existing Airworthiness Directives for Piaggio P166 series aeroplanes and reissues them as separate, standalone legal instruments. This is administrative housekeeping: the technical content and mandatory safety requirements remain unchanged. \n\nOwners, operators and maintenance engineers of Piaggio P166s must continue to comply with the same inspections, modifications and replacements previously required."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument does not broaden or narrow the substantive safety requirements applying to Piaggio P166 aeroplanes. It administratively revokes listed ADs and re-issues them as separate instruments in the same form as the latest published editions (per the instrument’s note). Therefore the legal scope of obligations on aircraft operators and maintainers remains as before; the change is to how the ADs are published and cited, not to their content."},"complexity_factors":["Short, single-purpose instrument (revocation and re-making)","Relies on one external regulation: Civil Aviation Safety Regulations subreg 39.001(1)","Schedule lists 35 AD entries (AD/P166/1 to AD/P166/35) — multiple line items to track","Some schedule entries annotated as CANCELLED or SUPPERSeded, introducing conditional status for particular AD numbers","Content of the re-made ADs is not included in the instrument (they are attached or in latest published editions), so users must cross-reference other documents","Administrative implications for filing/citation and records (possible version-control risk)"],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- The Civil Aviation Safety Authority (CASA) delegate uses a power in the Civil Aviation Safety Regulations (subreg 39.001(1)) to revoke a group of existing Airworthiness Directives (ADs) that apply to Piaggio P166 series aeroplanes, and to re-issue each of those ADs as a separate, standalone instrument (see Schedule 1).  \n- The instrument says each re-made AD is issued in exactly the same form as appears in the latest published edition of that AD (note in the instrument).  \n- The Schedule lists the individual ADs by title and AD number (AD/P166/1 through AD/P166/35, with some items marked as cancelled or superseded).\n\n**Who is affected**\n\n- Owners, operators and maintenance organisations responsible for Piaggio P166 series aeroplanes.  \n- Organisations that keep regulatory or maintenance records (airworthiness managers, continuing airworthiness authorities, maintenance organisations) because they must reference the correct AD instrument.  \n- CASA and its delegates (who make and maintain ADs) because the action changes how the ADs are published and cited.\n\n**Why it matters**\n\n- Airworthiness Directives are mandatory safety requirements: they direct inspections, modifications, replacements or operational limitations that must be complied with to keep an aircraft legally airworthy. Changing how ADs are published or cited can affect legal citation, record-keeping, and how operators find and demonstrate compliance.  \n- This instrument does not change the substantive requirements of the ADs themselves (it instructs the delegate to re-make them “in exactly the same form” as the latest published editions). However, it alters the form of the legal instruments (separate standalone AD instruments rather than the previous arrangement).\n\n**Official purpose-claim and a practical test of that claim**\n\n- The instrument’s explicit claim (in the note) is administrative: to re-issue each AD as a separate instrument in the same form as the latest published AD.  \n- Practical effects and trade-offs relative to that claim:  \n  - Implementation cost: The underlying safety requirements remain unchanged, so operators’ ongoing substantive compliance costs (inspections, modifications) do not increase because of this reissuing. Any new costs are administrative (updating records, citations, or compliance-tracking systems).  \n  - Incentives and behaviour: Regulators decide the format and citation of ADs; operators continue to follow the same technical actions required by each AD. The change may improve clarity of legal citation for some stakeholders but could cause short-term confusion if operators or documentation still cite the old consolidated instrument.  \n  - Bureaucratic discretion: The delegate used a regulation-granted power to alter the legal form of the instruments; the substance is untouched by the instrument’s own statement.  \n  - Risk and unintended consequences: Re-issuing identical ADs reduces the chance of content change, but creates implementation risks in administration (mismatched citations, version-control errors, or delays in attaching the separately issued ADs to regulatory databases).  \n\n**Who pays, who decides, and what changes in behaviour**\n\n- Who pays: Owners/operators bear the costs required by each AD (inspections, parts, labour). The act of revoking and re-making is primarily an administrative cost borne by the regulator; small administrative update costs may be borne by operators who must update their records.  \n- Who decides: A CASA delegate under subregulation 39.001(1) decided to revoke and re-issue the ADs (instrument text, Schedule 1).  \n- Behaviour change required: No change to the technical compliance behaviour mandated by each AD. The only behavioural change is administrative: reference, citation, or record-keeping may need updating to the re-made AD instrument identifiers.\n\n**Notable schedule entries that affect scope or practice**\n\n- The Schedule shows some entries are marked “CANCELLED” (for example AD/P166/15, AD/P166/18) or note that an AD was superseded (AD/P166/17 superseded by AD/P166/21). Those annotations indicate the list includes historical or already-cancelled items; the instrument’s effect is to revoke and then re-issue (or leave cancelled) the items as presented.\n\n**Bottom line**\n\n- This instrument is an administrative re-issuing of a set of Piaggio P166 airworthiness directives as separate legal instruments without altering their substantive requirements. It affects record-keeping and legal citation rather than imposing new technical obligations. (Power used: subreg 39.001(1); action: revocation as listed in Schedule 1 and re-making of each AD in the same published form.)"},"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-piaggio-p166-series-aeroplanes","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-piaggio-p166-series-aeroplanes/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-piaggio-p166-series-aeroplanes/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-piaggio-p166-series-aeroplanes/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-piaggio-p166-series-aeroplanes/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-piaggio-p166-series-aeroplanes/documents"}}