Abstract
The present paper analyzes various failures and performance degradation of a turboprop engine in a commuter aircraft. As this has caused premature withdrawals of engines affecting the fleet, it is of paramount importance to understand the cause of such failures so that preventive measures can be taken up. Defects or failures of parts in torquemeter assembly and in lubrication system are found to be the major causes of engine withdrawals, which constitute about 70% of all the failures. The statistical data on failures and their causes will be an invaluable input to the designers, maintenance house and operators as well.
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