B737NG Antiskid Functions
Hello everybody
IAW B737NG AMM, Antiskid/Autobrake Control Unit provides Touchdown Protection and Touchdown/Hydroplane Protection. Touchdown Protection releases brake pressure from wheel brakes 2 & 4 for some time after touchdown and Touchdown/Hydroplane protection releases brake pressure from wheel brakes 1 & 3 in case that the wheel speed decreases to 50 knots less than ground speed (source ADIRU). What is puzzling me is the selection of the wheel pairs that seems to be arbitrary. In my opinion a symmetrical wheel brake pairing pattern would make more sense. On the other hand I don't believe that some guys in Boeing's design department just chose randomly this configuration. Does anybody know something that is not described in AMM or Flight Manual?
Thanks in advance