Originally Posted by
BuzzBox
A ‘CONFIG GEAR’ EICAS warning is generated if the landing gear is not down and locked and one of the following occurs:
- Below 800 feet radio altitude and a thrust lever is at idle, or
- The flaps are in a landing position
A GPWS Mode 4A warning ‘TOO LOW GEAR’ is triggered at 500 ft RA.
Thanks for that info. Does the system on the 787 not use envelope modulation for mode 4? My understanding is that this is standard on all new Honeywell EGPWS, so you should get ‘TOO LOW, GEAR’ at 500 ft above the runway, rather than 500 ft RA.