{"id":"F2006B06035","name":"AD/PA-46/29 - Turbine Inlet Temperature Gauge","slug":"ad-pa-46-29-turbine-inlet-temperature-gauge","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114433,"registerId":"commonwealth-F2006B06035-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/PA-46/29 Turbine Inlet Temperature Ga","sectionType":"part","heading":"AD/PA-46/29 Turbine Inlet Temperature Gauge 8/2000","content":"# AD/PA-46/29 Turbine Inlet Temperature Gauge 8/2000\n\nApplicability: Models PA-46-310P and PA-46-350P aeroplanes, all serial numbers, that are equipped with a Lewis or Transicoil Turbine Inlet Temperature (TIT) Gauge and associated probe installed.\n\nNote 1: Relief from this Directive is available only if the gauge and probe have been replaced through a Supplemental Type Certificate or a modification approved pursuant to Civil Aviation Regulation (1988) 35 and not if a second TIT gauge was installed while retaining the Lewis or Transicoil gauge and probe.\n\nRequirement: For Model PA-46-310P aeroplanes:\n\n    Perform the following on the TIT System:\n\n    Clean and inspect the TIT gauge and probe in accordance with procedures in PA-46-310P/350P Maintenance Manual, Chapter 77-20-00 (section A.(1)(d), pages 1 and 2).\n\n    b. Calibrate the system in accordance with procedures in PA-46-310P/350P Maintenance Manual, Chapter 77-20-00 (pages 3 and 4).\n\n    2. Repair or replace any failed parts detected during the Requirement 1 inspection or calibration with serviceable parts as listed in Table 1.\n\n    3. Incorporate revised emergency procedures in Section 3 of the Aeroplane Flight Manual/Pilot’s Operating Handbook (AFM/POH). This may be accomplished by inserting the following statement in the AFM/POH or by incorporating the appropriate revision, listed in Table 2, in the AFM/POH.\n\n    (i) If the turbine inlet temperature indication fails during takeoff, climb, descent, or landing, maintain FULL RICH mixture to assure adequate fuel flow for engine cooling.\n\n    (ii) If the turbine inlet temperature indication fails after cruise power has been set, maintain cruise power setting and lean to 6 gallons per hour (GPH) fuel flow above that specified in the Power Setting Table in Section 5 of the AFM/POH. Continually monitor engine cylinder head and oil temperatures to avoid exceeding temperature limits.","sortOrder":1}],"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with focused scope addressing a specific unsafe condition in specific aircraft models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific applicability (two aircraft models with specific equipment)","Straightforward three-step requirement structure (inspect/calibrate, repair/replace, update manual)","Minimal cross-referencing (only to specific chapters of maintenance manual and two tables not provided in text)","No nested conditional logic or exceptions beyond one relief note regarding Supplemental Type Certificate replacements","Short, procedural document with clear compliance pathway"],"plain_english_summary":"This CASA Airworthiness Directive orders owners/operators of certain Piper Malibu (PA-46-310P/350P) aircraft equipped with Lewis or Transicoil turbine inlet temperature (TIT) gauges to ensure the gauge and probe are inspected, cleaned, calibrated and repaired or replaced as needed, and for the flight manual to be updated with failure procedures. It matters because inaccurate TIT indications can lead to engine overheating, power loss or failure — especially critical during takeoff and landing."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The AD, as presented, applies only to PA-46-310P and PA-46-350P aeroplanes fitted with Lewis or Transicoil TIT gauges and probes and prescribes maintenance, part replacement and AFM changes; there is no indication in the instrument text that the AD expands or narrows its scope beyond this stated applicability."},"complexity_factors":["Narrow applicability tied to specific models and specific installed equipment (Applicability).","Technical maintenance actions required to follow procedures in the PA-46-310P/350P Maintenance Manual, Chapter 77-20-00 (Requirement 1: clean/inspect and calibrate).","Mandatory repair-or-replace step referencing a parts/serviceable list (Requirement 2 and Table 1), creating potential parts-sourcing and cost issues for operators.","Mandatory update to aircraft documentation and pilot procedures (Requirement 3 and AFM/POH insertion), which changes operational steps for pilots.","Limited relief clause: relief only if gauge/probe replaced via Supplemental Type Certificate or modification approved under Civil Aviation Regulation (1988) 35; installing a second gauge while retaining the original does not provide relief (Note 1).","Regulatory footing is an AD issued under CAR 1998 subregulation 39.1(1) (preamble), giving the CASA delegate discretion to require corrective action.","Excerpt does not state explicit compliance deadlines or intervals in the provided text (the AD references a compliance section but that timing is not included), increasing operational uncertainty.","Implementation requires coordination between maintenance providers and operators, and may impose immediate out-of-service time for some aircraft."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of PA-46-310P and PA-46-350P aircraft fitted with a Lewis or Transicoil Turbine Inlet Temperature (TIT) gauge and probe to clean, inspect and calibrate the TIT system, repair or replace failed parts, and insert revised emergency procedures into the AFM/POH. Owners/operators pay for the maintenance, any part replacements and the AFM update; relief is available only where the gauge and probe have been replaced under an approved STC or CAR (1988) 35 modification."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-46-29-turbine-inlet-temperature-gauge","history":"/api/acts/ad-pa-46-29-turbine-inlet-temperature-gauge/history","analysis":"/api/acts/ad-pa-46-29-turbine-inlet-temperature-gauge/analysis","conflicts":"/api/acts/ad-pa-46-29-turbine-inlet-temperature-gauge/conflicts","importantCases":"/api/acts/ad-pa-46-29-turbine-inlet-temperature-gauge/important-cases","documents":"/api/acts/ad-pa-46-29-turbine-inlet-temperature-gauge/documents"}}