{"id":"F2006B11395","name":"AD/MU-2/65 - Engine Torque Indication System","slug":"ad-mu-2-65-engine-torque-indication-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57296,"registerId":"commonwealth-F2006B11395-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"For MU-2B-25, -26, -35 and -36 aeroplane","sectionType":"part","heading":"For MU-2B-25, -26, -35 and -36 aeroplanes:","content":"# For MU-2B-25, \\-26, \\-35 and \\-36 aeroplanes:\n\n    Inspect the torquemeter in accordance with MHI SB No 233 dated 7 October 1998.\n\n    2. If, during the Requirement 1 inspection, the errors in the torque indication system are found to exceed the allowable limit specified in the SB, repair or replace the torquemeter in accordance with the SB.\n\n    3. Inspect the torque transducer in accordance with the SB.\n\n    4. If, during the Requirement 3 inspection, the torque transducer output voltage is found to exceed the allowable limit specified in the SB, adjust the torque transducer output voltage in accordance with the SB.\n\n    5. Accomplish a ground check of the engines in accordance with the SB.\n\nNote: JCAB AD TCD-4889-98 refers.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":3083},"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive remains tightly focused on the specific airworthiness concern identified in the background: miscalibrated torque indication systems in the specified MU-2 variants. There is no evidence of scope expansion beyond addressing the safety risk of undetected engine power mismatch and degraded handling qualities."},"complexity_factors":["Mandatory compliance with external technical standard (Mitsubishi Heavy Industries Service Bulletin No 233) not reproduced within the directive text","Conditional maintenance actions triggered by inspection findings (repair only if limits exceeded)","Mixed compliance timeframes combining cumulative flight hour limits (100 hours time in service) with immediate grounding provisions (before further flight)","Technical aviation terminology requiring engineering knowledge to identify specific components (torquemeter, torque transducer)"],"plain_english_summary":"This mandatory Airworthiness Directive orders operators of Mitsubishi MU-2B-25/26/35/36 aeroplanes to inspect engine torquemeters and torque transducers per Mitsubishi Service Bulletin No. 233, repair or replace any units out of limits, and perform a ground engine check. \n\nInspections are due within 100 flight hours after 10 March 1999; aircraft must be fixed before next flight if defects are found. The rule prevents undetected engine power mismatches that can degrade control and safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-mu-2-65-engine-torque-indication-system","history":"/api/acts/ad-mu-2-65-engine-torque-indication-system/history","analysis":"/api/acts/ad-mu-2-65-engine-torque-indication-system/analysis","conflicts":"/api/acts/ad-mu-2-65-engine-torque-indication-system/conflicts","importantCases":"/api/acts/ad-mu-2-65-engine-torque-indication-system/important-cases","documents":"/api/acts/ad-mu-2-65-engine-torque-indication-system/documents"}}