Originally Posted by
Herod
An explanation please.
As mentioned. The old, RA-based GPWS had no reason to go off.
The basic (most likely fitted as per mandate) E-GPWS has a 'Terrain Clearance Floor' which protects you from killing people fully configured where there's no airport - but in this case they were sufficiently close to a runway the alarm did not trigger.
There are more evolved setups, EGPWS+ if you will, unlikely to be fitted to this ship.