747-400 Park Brake
Just a (strange) thought.... Can the park brake be set using only one pedal?
It's not clear in the manuals if both (L/R) brake pedals need to be pushed to park the brake. They tell you to do this, but is this simply to ensure that both left AND right brakes are parked (and to stop the pedal moving away from you through rudder action).
The park brake lever locks both pedals (if both pedals are pushed) through a dual pawl mechanism and also activates the electric park brake valve (to trap hydraulic fluid in the system). Will the park brake mechanism allow only one of the pawls to latch?
I don't have a good schematic of the brake hydraulics. Perhaps this scenario is not possible due to fluid escaping somewhere.
Thanks for any insight.
Cheers.
NSEU