Altitude deviation altitude excursion during GPWS alert.

Attributes
ACN	250091
Time
Date	199308
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dca
State Reference	DC
Altitude	msl bound lower : 6000 msl bound upper : 7300
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dca
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 175 flight time total : 8500 flight time type : 1700
ASRS Report	250091
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	controller : issued new clearance flight crew : took evasive action flight crew : exited adverse environment
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

Captain flying using AFDS. Moderate rain, light chop at 6000 ft. GPWS 'terrain, climb, climb' began and persisted for 30 seconds. Captain disengaged autoplt and climbed to 7300 ft MSL before warnings ceased. I immediately advised ATC we were in emergency climb. ATC advised 'return to 6000 ft when able.' this month's air carrier magazine contained article advising of possible GPWS alerts in moderate to heavy rain! I read this article 3 days after incident. I believe we responded appropriately since we were in IMC and GPWS warning was continuous.

Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION DURING GPWS ALERT.

Narrative: CAPT FLYING USING AFDS. MODERATE RAIN, LIGHT CHOP AT 6000 FT. GPWS 'TERRAIN, CLB, CLB' BEGAN AND PERSISTED FOR 30 SECONDS. CAPT DISENGAGED AUTOPLT AND CLBED TO 7300 FT MSL BEFORE WARNINGS CEASED. I IMMEDIATELY ADVISED ATC WE WERE IN EMER CLB. ATC ADVISED 'RETURN TO 6000 FT WHEN ABLE.' THIS MONTH'S ACR MAGAZINE CONTAINED ARTICLE ADVISING OF POSSIBLE GPWS ALERTS IN MODERATE TO HVY RAIN! I READ THIS ARTICLE 3 DAYS AFTER INCIDENT. I BELIEVE WE RESPONDED APPROPRIATELY SINCE WE WERE IN IMC AND GPWS WARNING WAS CONTINUOUS.

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.