{"id":"F2009L03410","name":"AD/TPE 331/42 Amdt 1 - Torque Sensor - CANCELLED","slug":"ad-tpe-331-42-amdt-1-torque-sensor-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":140988,"registerId":"commonwealth-F2009L03410-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AlliedSignal (Garrett/AiResearch) Turbin","sectionType":"division","heading":"AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series","content":"### AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series\n\n| AD/TPE 331/42 Amdt 1 | Torque Sensor | 10/2009 |\n| -------------------- | ------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                            |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 24 September 2009.                                                                                                                                                                                                                            |\n| Background:  | This unique Australian AD specified replacement of hydraulic torque sensor P/N 3101726-1 in accordance with either SB No. 72-0232 Rev 6 or SB No. 72-0555Rev 4. Compliance was required at the next engine overhaul after January 1994. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n14 August 2009","sortOrder":0},{"sectionNumber":"AD/TPE 331/42 Amdt 1","sectionType":"part","heading":"AD/TPE 331/42 Amdt 1","content":"## AD/TPE 331/42 Amdt 1","sortOrder":1},{"sectionNumber":"Torque Sensor","sectionType":"part","heading":"Torque Sensor","content":"## Torque Sensor","sortOrder":2},{"sectionNumber":"10/2009","sectionType":"part","heading":"10/2009","content":"## 10/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":3341},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The amendment cancels the entire directive, eliminating the mandatory torque sensor replacement requirement that was its original core provision. This represents a fundamental departure from the initial regulatory obligation, reducing the scope to zero rather than expanding it."},"complexity_factors":["Single operative provision (cancellation)","No defined terms, conditional logic, or nested exceptions","References to technical service bulletins (SB No. 72-0232 Rev 6 and SB No. 72-0555 Rev 4) and part numbers require aviation maintenance knowledge to fully contextualise"],"plain_english_summary":"**This directive cancels a previous maintenance rule for certain aircraft engines.**\n\n**What it does:**\n- Removes a requirement for owners of AlliedSignal (Garrett/AiResearch) TPE 331 turbine engines to replace a specific hydraulic torque sensor (part number 3101726-1).\n- The original rule required this replacement during the next engine overhaul after January 1994, following procedures in specific service bulletins.\n\n**Who it affects:**\n- Aircraft operators and maintenance organisations using TPE 331 series engines (commonly found in regional turboprop aircraft).\n- Specifically those who had not yet completed the torque sensor replacement mandated by the previous directive.\n\n**Why it matters:**\n- Eliminates a maintenance obligation that is no longer deemed necessary for airworthiness.\n- Allows operators to avoid the cost and downtime of this specific sensor replacement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor-cancelled","history":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor-cancelled/history","analysis":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor-cancelled/analysis","conflicts":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor-cancelled/conflicts","importantCases":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor-cancelled/important-cases","documents":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor-cancelled/documents"}}