I personally had an engine failure but it was caused by contam fuel; 1979, Ballykelly, Kangaw Flt, 3 Cdo Bde Air Sqn RM. Night sun task. Had just woken up for a 'scramble'. Got the ac ready to go but just before lifting I decided to select a different VHF AM freq. As I turned the freq selector the engine died. Realising it shouldn't do that I reselected the original frequency (presumably to get the engine going again). It took a few long seconds before I realised that things were really not quite right. Got in a different ac and flew for 2 hours on a gloomy night and returned to BallyK to be told that the ac I had just been flying was refuelled from the same source at around the same time.
Had a wholesome respect for single engine failures in twin engined aircraft since then.