Narrative:

Friday may/xr/00, on a domestic flight from denver to indianapolis flight air carrier X experienced actual windshear at 500 ft AGL on departure. It was the captain's leg and he was flying, we took off from runway 17R with the wind at 160 degrees 9 KTS using standard power at N1 102.6. There was no report of LLWS or any meteorological condition that would cause us to suspect LLWS. At approximately 500 ft AGL on departure we encountered windshear. There was a 10-15 KT instantaneous drop in airspeed and an aural and visual windshear alert from the onboard GPWS system (red light). At this point we also encountered moderate turbulence. We immediately executed phase I's. After the phase I procedure were accomplished, I (first officer) notified denver tower 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 airspeed loss below V2 (after the initial loss of 10-15 KTS) or any loss of altitude. After approximately 10 seconds airspeed increased (approximately 30 KTS) to 170 KTS and power was reduced to maximum. I (first officer) continued to call out vvi's of over +2000. Airspeed fluctuations were about 30 KTS and turbulence was moderate until about 3000 ft AGL. ATC had issued a departure clearance of 'left turn to 080 degrees at 6500 ft MSL.' the captain, executing his emergency authority/authorized remained on runway heading until the aircraft was stabilized (approximately 8500 ft MSL). We coordinated the late turn with tower. I made the initial windshear report to denver tower at the onset of windshear and after we were stable issued a detailed PIREP. Windshear procedure worked well. This windshear was completely 'out of the blue' with no prior indication at all.

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Original NASA ASRS Text

Title: 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.

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.