flight controls batteries
Quoting :
In addition to the batteries in question there are two other batteries for standby power of the flight controls. No one seems to question these?
IF similar to 777 , it should be 3 small batteries used during 1 minute on electrical transfers to power not 3 primary flight control computers but to power 3 components transforming variable power to 28DC for flight controls.
By the way on the 777 , there is a small battery 3 ft behind pilots .