An FK100 flight crew responds to a second GPWS alert at 11000 ft while deviating IMC around thunders...

Attributes
ACN	514694
Time
Date	200106
Day	Fri
Local Time Of Day	1801 To 2400
Place
Altitude	msl single value : 11000
Environment
Flight Conditions	IMC
Weather Elements	Thunderstorm
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Flight Phase	cruise : level ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	514694
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	514693
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 : gpws other controllera other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action other
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance Weather Aircraft
Primary Problem	Aircraft

Narrative:

After being delayed on ground for 3 hours in ord, we were allowed to depart to dca on a more direct routing. Dispatch sent message telling us we were going to be 3000 pounds overweight. I elected to go low to increase fuel burn and we had to go as far south as iiu to get around WX. When we started to pick our way through the WX, we got a GPWS warning of too low terrain. We doubted the warning knowing our highest emergency safe altitude was approximately 3000 ft in the area. We received almost immediately a second GPWS learning of too low terrain and I performed the escape maneuver. We advised ATC of the climb and they told us there was no conflicts. We climbed to 12000 ft and was subsequently cleared by ATC to climb to 15000 ft. ATC informed us that there was no loss of separation. Even though we knew terrain was not a factor, I thought it prudent to climb being in moderate precipitation and a second warning sounded. Supplemental information from acn 514693: while picking our way through thunderstorms, we got a GPWS warning of too low terrain. We were IFR at the time and had no visual terrain clearance.

Original NASA ASRS Text

Title: AN FK100 FLC RESPONDS TO A SECOND GPWS ALERT AT 11000 FT WHILE DEVIATING IMC AROUND TSTM ACTIVITY NEAR YRK, KY.

Narrative: AFTER BEING DELAYED ON GND FOR 3 HRS IN ORD, WE WERE ALLOWED TO DEPART TO DCA ON A MORE DIRECT ROUTING. DISPATCH SENT MESSAGE TELLING US WE WERE GOING TO BE 3000 LBS OVERWT. I ELECTED TO GO LOW TO INCREASE FUEL BURN AND WE HAD TO GO AS FAR S AS IIU TO GET AROUND WX. WHEN WE STARTED TO PICK OUR WAY THROUGH THE WX, WE GOT A GPWS WARNING OF TOO LOW TERRAIN. WE DOUBTED THE WARNING KNOWING OUR HIGHEST EMER SAFE ALT WAS APPROX 3000 FT IN THE AREA. WE RECEIVED ALMOST IMMEDIATELY A SECOND GPWS LEARNING OF TOO LOW TERRAIN AND I PERFORMED THE ESCAPE MANEUVER. WE ADVISED ATC OF THE CLB AND THEY TOLD US THERE WAS NO CONFLICTS. WE CLBED TO 12000 FT AND WAS SUBSEQUENTLY CLRED BY ATC TO CLB TO 15000 FT. ATC INFORMED US THAT THERE WAS NO LOSS OF SEPARATION. EVEN THOUGH WE KNEW TERRAIN WAS NOT A FACTOR, I THOUGHT IT PRUDENT TO CLB BEING IN MODERATE PRECIPITATION AND A SECOND WARNING SOUNDED. SUPPLEMENTAL INFO FROM ACN 514693: WHILE PICKING OUR WAY THROUGH TSTMS, WE GOT A GPWS WARNING OF TOO LOW TERRAIN. WE WERE IFR AT THE TIME AND HAD NO VISUAL TERRAIN CLRNC.

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.

An FK100 flight crew responds to a second GPWS alert at 11000 ft while deviating IMC around thunderstorm activity near yrk, ky.