Originally Posted by
PEI_3721
Re #64/67. The information appears to relate to Airbus aircraft which may use an alternative form of TAWS/GPWS.
Was this aircraft fitted with TAWS or EGPWS?
Did this aircraft have an external GPS (Nav). Was this connected to EGPWS, or did the aircraft only have a GPS receiver within EGPWS (no Nav), or none at all?
What is the resolution of the EGPWS terrain data base in this area, similarly for the airfield. If the airport was not fully covered then basic GPWS should still be available - subject to switching / selection.
Rad Alt will display altitude according to scale, normally at any time less than 2500ft agl. (E)GPWS will use this, and thus if serviceable there should at least have been a basic GPWS alert / warning.
IIRC ATR had a history with GPWS inhibit switching, it could be completely switched off to inhibit nuisance alerts (fatal accident, ... Taipei ??) . Is similar switching used for EGPWS, or is there the more conventional selection of terrain off - leaving the basic system active?
I don't know, what kind of navigation equipment was installed on this airctaft. GPS, probably, is HT-1000.
RadioAltimeter can't work in this case - out of range ( abt 1500 m).