A320 crew got an egpws terrain warning on descent to iad.

Attributes
ACN	564783
Time
Date	200211
Day	Tue
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : iad.airport
State Reference	DC
Altitude	msl single value : 2300
Environment
Light	Night
Aircraft 1
Controlling Facilities	tower : iad.tower
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 19l other
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	564783
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	altitude deviation : excursion from assigned altitude inflight encounter : weather inflight encounter other non adherence : company policies non adherence : far non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment : gpws other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : took evasive action flight crew : exited adverse environment
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We were on vectors descending to 2000 ft. Passing 2300 ft at approximately 200-300 FPM, we had a 'terrain-pull up' GPWS warning. We immediately climbed to approximately 3000 ft and leveled off as the warning ceased. We continued the approach after telling ATC what happened. He didn't seem concerned. No apparent high terrain in the area. Made an announcement for the passenger to ensure that their cell phones are off.

Original NASA ASRS Text

Title: A320 CREW GOT AN EGPWS TERRAIN WARNING ON DSCNT TO IAD.

Narrative: WE WERE ON VECTORS DSNDING TO 2000 FT. PASSING 2300 FT AT APPROX 200-300 FPM, WE HAD A 'TERRAIN-PULL UP' GPWS WARNING. WE IMMEDIATELY CLBED TO APPROX 3000 FT AND LEVELED OFF AS THE WARNING CEASED. WE CONTINUED THE APCH AFTER TELLING ATC WHAT HAPPENED. HE DIDN'T SEEM CONCERNED. NO APPARENT HIGH TERRAIN IN THE AREA. MADE AN ANNOUNCEMENT FOR THE PAX TO ENSURE THAT THEIR CELL PHONES ARE OFF.

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.