FLC OF AN ACR WDB CARGO EXPERIENCE WINDSHEAR GPWS WARNING AFTER TKOF AT DEN CAUSING THEM TO PERFORM AN ESCAPE MANEUVER STRAIGHT AHEAD UNTIL CLR OF THE WINDSHEAR AND TURB.

Narrative

FRIDAY MAY/XR/00; ON A DOMESTIC FLT FROM DENVER TO INDIANAPOLIS FLT ACR X EXPERIENCED ACTUAL WINDSHEAR AT 500 FT AGL ON DEP. IT WAS THE CAPT'S LEG AND HE WAS FLYING; WE TOOK OFF FROM RWY 17R WITH THE WIND AT 160 DEGS 9 KTS USING STANDARD PWR AT N1 102.6. THERE WAS NO RPT OF LLWS OR ANY METEOROLOGICAL CONDITION THAT WOULD CAUSE US TO SUSPECT LLWS. AT APPROX 500 FT AGL ON DEP WE ENCOUNTERED WINDSHEAR. THERE WAS A 10-15 KT INSTANTANEOUS DROP IN AIRSPD AND AN AURAL AND VISUAL WINDSHEAR ALERT FROM THE ONBOARD GPWS SYS (RED LIGHT). AT THIS POINT WE ALSO ENCOUNTERED MODERATE TURB. WE IMMEDIATELY EXECUTED PHASE I'S. AFTER THE PHASE I PROC WERE ACCOMPLISHED; I (FO) NOTIFIED DENVER TWR THAT WE WERE EXPERIENCING WINDSHEAR AND TO STAND BY FOR A PIREP WHEN WE WERE STABLE. AS I WAS CALLING OUT VVI AND RA; AT ONE POINT WE WERE +2000 VVI AND STABLE RA (LEVEL). AT NO TIME WAS THERE AN AIRSPD LOSS BELOW V2 (AFTER THE INITIAL LOSS OF 10-15 KTS) OR ANY LOSS OF ALT. AFTER APPROX 10 SECONDS AIRSPD INCREASED (APPROX 30 KTS) TO 170 KTS AND PWR WAS REDUCED TO MAX. I (FO) CONTINUED TO CALL OUT VVI'S OF OVER +2000. AIRSPD FLUCTUATIONS WERE ABOUT 30 KTS AND TURB WAS MODERATE UNTIL ABOUT 3000 FT AGL. ATC HAD ISSUED A DEP CLRNC OF 'L TURN TO 080 DEGS AT 6500 FT MSL.' THE CAPT; EXECUTING HIS EMER AUTH REMAINED ON RWY HEADING UNTIL THE ACFT WAS STABILIZED (APPROX 8500 FT MSL). WE COORDINATED THE LATE TURN WITH TWR. I MADE THE INITIAL WINDSHEAR RPT TO DENVER TWR AT THE ONSET OF WINDSHEAR AND AFTER WE WERE STABLE ISSUED A DETAILED PIREP. WINDSHEAR PROC WORKED WELL. THIS WINDSHEAR WAS COMPLETELY 'OUT OF THE BLUE' WITH NO PRIOR INDICATION AT ALL.