Ish - if it is the generator malfunction I remember, it happened to a mate of mine J** C******* who also was the creator of the Auchnacloy Trench (40 plus degrees nose up to get the TR to hit first in a Wessex!
The generator problem highlighted the lack of a volt meter to monitor the busbar and a bad gen could undervolt sufficiently to drag the good one off as well - welcome to double computer freeze land!!