757 Gpws
On the 737-NG the input to the EGPWS is the Capt. Radio Altimeter, #1GS, FMC, #1ADIRU, landing gear and flap switches, SMYD. If loosing the Capt. radio alt. no GPWS will work.
Is this also the case in the 757.
(just a student pilot with a huge interest in Boeing systems)
Cheers