Apparently the eng failure in this case was caused by a faulty Overspeed Trip Governor which operated and shut the engine down. The aircraft was hovering at 50' asl at the time, during a night-time training sortie. Prompt and correct action by the crew meant that the aircraft was recovered without further difficulty. Total cost of eng failure: 1x new OTG, 4x new seat covers!
Good effort Spacer and crew