PA-44 Seminole/Turbo Seminole
Flight Crew Instrument; Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Multiengine
Aircraft Equipment Problem Critical
Flight Crew Overcame Equipment Problem; Flight Crew Returned To Departure Airport; Flight Crew Landed As Precaution
Aircraft; Procedure
During a routine single engine training flight; the Left engine would not restart in flight. Starter would not turn the engine at all. The right engine was hot and approaching max CHT (Cylinder Head Temperature). An engine-cooling descent was started after the decision was made to discontinue starting and return to [departure airport] single engine because maintaining altitude on only the Right engine would result in possible Right engine overheating. The position was 7;000 feet; 14 NM [from departure airport]. [Pilot receiving instruction] continued flying and instructor conducted checklists and coordinated with ATC. ATC contact was made at 4;000 feet and crew requested direct to the numbers RNWY 9L. Instructor pilot conducted single engine landing.
An instructor pilot reported being unable to restart the left engine in a PA-44 after conducting single engine training with a student. A successful single engine approach and landing was made.