The Maintenance Manual of B747 says that when u r going for a hi power run up, the generator must be on line or CSD be disconnected. My querry lies here. What goes wrong if it is not followed and WHY it happens so ?
To keep it going, I would like to furher add that once the generator got fire because of not taking it on line, definitely Gen field was closed and V & F were available. Same thing can be seconded by the Opn Mnl which says to disconnect CSD if Generator does not come on line for any reason. Big Question is why fire took place, definitely CSD oil level was ok.
One more thing for my info, is this true for all sort of aircrafts to disconnect CSD if gen fail to come on line .
Waiting for your comments. Thanx