GPWS activates during descent.

Attributes
ACN	290122
Time
Date	199412
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : anc
State Reference	AK
Altitude	msl bound lower : 1600 msl bound upper : 1600
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : anc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp pilot : private
Experience	flight time last 90 days : 150 flight time total : 18000
ASRS Report	290122
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : exited adverse environment flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Received low altitude warning, pulled up and discovered altimeter setting was misset. Altimeter was set at 29.84 and should have been set at 28.84. Crew distracted with a problem on the pneumatics about the time of altimeter transition from flight levels to altitudes.

Original NASA ASRS Text

Title: GPWS ACTIVATES DURING DSCNT.

Narrative: RECEIVED LOW ALT WARNING, PULLED UP AND DISCOVERED ALTIMETER SETTING WAS MISSET. ALTIMETER WAS SET AT 29.84 AND SHOULD HAVE BEEN SET AT 28.84. CREW DISTRACTED WITH A PROB ON THE PNEUMATICS ABOUT THE TIME OF ALTIMETER TRANSITION FROM FLT LEVELS TO ALTS.

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.