The ground prox/taws would have warned below glideslope, perhaps terrain closure rate, and too low...
Depending on how they dropped, descent rate near terrain
Warning for closure rate
The altitude annunciator would have been giving them the periodic, and the 50 foot..There is altitude callouts in 10 foot increments, they certainly heard the 100 foot increments, but that is custom set, so not certain how often altitude was annunciated, but I bet they had 50 foot called.
The is Boeing, so the system uses a 500'ROC at FAF, and tapers down, (AB is 400' ROC at FAF) so they would not have had the required obstacle clearance and it would warn of imminent ground contact...
They would have the forward looking capability, based on the FAF, threshold location, thus the predicted flightpath, and this would have been yet another warning, more than 2 dots below flightpath.
It would have given a premature descent alert when that far below flightpath.
IF windshear had occurred, that would have been another warning.
EDIT: approach over water, there is supposed to be an additional obstacle area added for the transient boat traffic, unclear if this is added to their database.
Last edited by underfire; 30th Mar 2017 at 01:51.