While on CAT ii approach, flight crew receives GPWS alert.

Attributes
ACN	225926
Time
Date	199211
Day	Tue
Place
Locale Reference	airport : geg
State Reference	WA
Altitude	msl bound lower : 7000 msl bound upper : 8500
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : geg tower : dfw
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : atp pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 5000 flight time type : 1500
ASRS Report	225926
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Aircraft en route mem-geg. While being vectored for the ILS runway 21 CAT ii approach at get, the GPWS went off sounding 'terrain, terrain.' since the aircraft was IMC, the captain elected to do the GPWS escape maneuver climbing to 8500 MSL and notified get approach. They explained that several other aircraft had indicated the same problem in this area, but they had complied with MVA for that area.

Original NASA ASRS Text

Title: WHILE ON CAT II APCH, FLC RECEIVES GPWS ALERT.

Narrative: ACFT ENRTE MEM-GEG. WHILE BEING VECTORED FOR THE ILS RWY 21 CAT II APCH AT GET, THE GPWS WENT OFF SOUNDING 'TERRAIN, TERRAIN.' SINCE THE ACFT WAS IMC, THE CAPT ELECTED TO DO THE GPWS ESCAPE MANEUVER CLBING TO 8500 MSL AND NOTIFIED GET APCH. THEY EXPLAINED THAT SEVERAL OTHER ACFT HAD INDICATED THE SAME PROBLEM IN THIS AREA, BUT THEY HAD COMPLIED WITH MVA FOR THAT AREA.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.