{"id":"F2006B07453","name":"AD/TPE 331/42 Amdt 1 - Torque Sensor","slug":"ad-tpe-331-42-amdt-1-torque-sensor","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49791,"registerId":"commonwealth-F2006B07453-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TPE 331/42 Amdt 1 - Torque Sensor","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nAlliedSignal (Garrett/AiResearch) Turbine Engines \\- TPE 331 Series\n\nAD/TPE 331/42\n\nAmdt 1\n\n  \nTorque Sensor 1/94\n\nApplicability: TPE331-1, \\-2, \\-3, \\-5, \\-6, \\-8 and \\-10 series engines fitted with a part number 3101726- 1 hydraulic torque sensor gear assembly.\n\nRequirement: Replace the part number 3101726-1 hydraulic torque sensor with a P/N 3101726-2 torque sensor in accordance with Allied Signal Aerospace SB TPE331-72-0232 Revision 6 or, with a P/N 3101726-3 torque sensor in accordance with Allied Signal Aerospace SB TPE331-72-0555 Revision 4.\n\nCompliance: Effective 6 January 1994; at next engine overhaul or next access to the affected part, whichever occurs first.\n\nBackground: This Directive requires the replacement of the P/N 3101726-1 torque sensor. The requirement reflects concern that failure of the torque sensor could result in the loss of fuel control drive. This amendment reflects the availability of the P/N 3101726-3 torque sensor which provides larger, directly lubricated \"idler\" gearshaft bearings.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2305},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment adds an alternative replacement part (P/N 3101726-3) as an approved compliance option alongside the originally mandated P/N 3101726-2, but does not expand the directive beyond its original purpose of replacing the unsafe P/N 3101726-1 torque sensor."},"complexity_factors":["Requires cross-referencing external manufacturer service bulletins for installation procedures","Technical applicability limited to specific engine models and part numbers","Simple amendment structure adding alternative compliance option to existing directive"],"plain_english_summary":"This airworthiness directive requires owners/operators of TPE331-1, -2, -3, -5, -6, -8, and -10 series engines fitted with hydraulic torque sensor P/N 3101726-1 to replace that part with an approved alternative (P/N 3101726-2 per AlliedSignal SB TPE331-72-0232 Rev.6 or P/N 3101726-3 per SB TPE331-72-0555 Rev.4). \n\nThe change prevents torque sensor failure that can cause loss of fuel control drive. Compliance is required by the next engine overhaul or the next time the part is accessed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor","history":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor/history","analysis":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor/analysis","conflicts":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor/conflicts","importantCases":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor/important-cases","documents":"/api/acts/ad-tpe-331-42-amdt-1-torque-sensor/documents"}}