B737NG Standby Rudder On/FFM
Hello,
I read it over and over again and most probably one time too much because now I am puzzled.
With the FFM detecting a force fight and automatically turning on the Standby Hydraulic Pump to power the Standby Rudder is Hydraulic System A and Hydraulic System B shut off to the Main PCU? It would do so in manual operation of the related FLT CONTROL switch to STBY RUD but how would it know which system is faulty during a force fight and in automatic operation?
Any suggestions or answers appreciated.
Brgds.