DA42 Flight Instructor and student reported safely landing at a diversion airport after the right engine failed to restart after it was shut down during a training exercise.
Synopsis
DA42 Flight Instructor and student reported safely landing at a diversion airport after the right engine failed to restart after it was shut down during a training exercise.
Narrative
On Day 0; a commercial multi-engine lesson was conducted in Aircraft X. During the flight; a Right engine failure occurred resulting in an emergency landing at ZZZ.Prior to the flight a pilot briefing was completed; and the airplane was preflighted according to SOPs. No abnormal findings were noted during the preflight inspection. The airplane was also runup with no abnormal findings or annunciations. Up until the engine failure occurred; the airplane behaved normally with no signs of apparent issue. Just prior to the failure; the maneuver 'Maneuvering with One Engine Inoperative' was conducted. This involves an engine shutdown; with maneuvers to be completed while the engine is off and secured. The maneuvers consist of turns; climbs; descents; and an emergency descent. The R engine was shutdown and secured; and the maneuvers listed were conducted. After these maneuvers; the flight was positioned at ~3;300 ft MSL and 8 miles northeast of ZZZ. After the emergency descent; an engine restart was initiated by consulting the QRH for engine restart. The emergency descent and QRH consultation for restart are a normal part of the maneuver named above; and were not associated with the actual engine failure. Upon attempting engine restart; once the key was turned; the R engine began shaking violently and began turning. Restart attempt was ceased immediately; however the engine continued to windmill and shake vigorously. The IP immediately took controls. The R engine master was set to off; however this did not fix either the windmilling or the shaking. It appeared that the propeller would not feather normally. The decision was quickly made to divert to the closest airport; which was ZZZ. The QRC was then consulted to completely secure the engine; as opposed to simulating securing as done during normal operations. This included turning off the alternator; fuel pump (which was already off); and the fuel selector. While these operations were being completed by the SP; the IP contacted ZZZ Approach and called requesting priority handling; advising the situation; position; and intentions. A course was set for ZZZ and the descent checklist was completed. During the flight to ZZZ; the engine continued to shake and windmill. The L downwind for Runway XX was entered; as there would have been a strong quartering tailwind on Runway XY. The flight made a safe landing at ZZZ on Runway XX with no damage to the airplane; or injuries of the crew. The airplane was taxied to the ramp; parked; and squawked.
Second reporter narrative
During the descent maneuver. Right engine was idle. Did the rapid fly acronym. Secured the engine. Began descent from around 5800-3000; Recovered. Pulled out the quick reference handbook and initiated the recovery of the dead engine. Made sure the right engine throttle was idle; with fuel selector on; turned the engine master on; and turned the key. Engine that was off began to sputter. MEI initiated by requesting priority handling. Told Approach how close we were from the nearest airport. How much fuel and souls onboard. Was able to successfully land in ZZZ.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.