Brenoch and everybody else:
Many thanks for all your researches and replies. The comment about maintenance manuals and the new A5 format was illustrated again today.
B767 accessory panel; in my old A4 books there was mention of this panel and the Field relays for the IDGs. In the A5 version no mention of Field relays at all and no referal to the switches on the accessory panel. However, in the tech questions there was a question about Field Relays and the GEN control switch. I engaged MK.1 memory, stuck my neck out, tried to draw the circuit and it all made sense. Fortunately we had an empty sim' at hand to test the theory. I won the beers. There was not a jot
(n)or tittle about it in the books.
Do I hear a cry at the back for "bring back the FE?"
But that's another topic.
Thanks again. If I have any more starters for 10, I'll know where to come. No commissions!