Job Duties and Tasks for: Aircraft Engine Specialist. 1) Replaces or repairs worn, defective, or damaged components, using hand tools, gauges, and testing equipment. 2) Tests engine operation, using test equipment such as ignition analyzer, compression checker, distributor timer, and ammeter, to identify malfunction. 3) Listens to operating engine to detect and diagnose malfunctions, such as sticking or burned valves. 4) Reassembles engine and installs engine in aircraft.