What does an amber FAULT light in the SYS pb indicate on the GPWS panel?
Could be any failure of the GPWS basic modes.
Does a FAULT light in the SYS pb on the GPWS panel affect the TERRAIN mode?
No
When would you press the FLAP MODE pb?
To avoid nuisance warnings when landing with flaps less than 3.
What does FLAP MODE OFF light indicate?
“Too low flaps” inhibited for landing with LESS THAN flap 3.
If the TERR mode failed does it affect the basic GPWS?
No.