An S80 flight crew experiences low level windshear warning during takeoff at 1000 ft AGL at ord. The...

Attributes
ACN	401979
Time
Date	199805
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	agl bound lower : 1000 agl bound upper : 1500
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord tower : ord tower : mdw
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : initial other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	401979
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	401841
Events
Anomaly	aircraft equipment problem : critical inflight encounter other other anomaly
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : exited adverse environment flight crew : took evasive action flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	other

Narrative:

Departing ord runway 32L from intersection T10 we received a red windshear light and an audible windshear warning passing through approximately 1000 ft AGL. The captain disconnected the autothrottles and advanced the throttles to maximum power. I noted egt on both engines was above 650 degrees and EPR at 2.24 and 2.26. He pulled the nose up to about 15 degrees pitch up. Within a few hundred ft and 10-15 seconds, the warning ended. The captain then reduced pitch and power to normal levels. I told the captain we had overboosted the engines. We agreed that an air abort back to ord was in order. We continued the climb to 5000 ft MSL while cleaning up the flaps and slats. I notified ord tower of the windshear and our intention to return to ord. Tower sent us to departure control where we declared an emergency for the engine condition and the impending overweight landing 136000 pounds. I passed emergency data and a request for vectors runway 9R ILS. On vectors with the aircraft stable we turned to the flight manual to review engine overspd/overtemp and overweight landing procedures. The captain made an uneventful overweight landing. Total flight time 14 mins. Predep ATIS indicated moderate precipitation, nnw, 8 NM. WX radar showed a few areas of red returns but not along our immediate flight path. The windshear warning was not accompanied by any immediate changes in airspeed or vertical velocity. The windshear light and audible warning while still in takeoff confign and at only 1000 ft AGL were sufficient conditions to warrant a red box escape maneuver. Aircraft system reacted in accordance with the flight manual. Supplemental information from acn 401841: WX at ord was approximately 600 ft, 2 DME with slight tailwind for runway 32L T10 intersection. Areas of moderate showers were reported within 10 mi of the airport to the west and northwest. Captain was PF. Notified the flight attendants first then passenger of our need to return. Landing was uneventful. First officer did an excellent job.

Original NASA ASRS Text

Title: AN S80 FLC EXPERIENCES LOW LEVEL WINDSHEAR WARNING DURING TKOF AT 1000 FT AGL AT ORD. THE ESCAPE MANEUVER OVERBOOSTED THE ENGS SO THE FLT RETURNS TO ORD AS EMER TFC.

Narrative: DEPARTING ORD RWY 32L FROM INTXN T10 WE RECEIVED A RED WINDSHEAR LIGHT AND AN AUDIBLE WINDSHEAR WARNING PASSING THROUGH APPROX 1000 FT AGL. THE CAPT DISCONNECTED THE AUTOTHROTTLES AND ADVANCED THE THROTTLES TO MAX PWR. I NOTED EGT ON BOTH ENGS WAS ABOVE 650 DEGS AND EPR AT 2.24 AND 2.26. HE PULLED THE NOSE UP TO ABOUT 15 DEGS PITCH UP. WITHIN A FEW HUNDRED FT AND 10-15 SECONDS, THE WARNING ENDED. THE CAPT THEN REDUCED PITCH AND PWR TO NORMAL LEVELS. I TOLD THE CAPT WE HAD OVERBOOSTED THE ENGS. WE AGREED THAT AN AIR ABORT BACK TO ORD WAS IN ORDER. WE CONTINUED THE CLB TO 5000 FT MSL WHILE CLEANING UP THE FLAPS AND SLATS. I NOTIFIED ORD TWR OF THE WINDSHEAR AND OUR INTENTION TO RETURN TO ORD. TWR SENT US TO DEP CTL WHERE WE DECLARED AN EMER FOR THE ENG CONDITION AND THE IMPENDING OVERWT LNDG 136000 LBS. I PASSED EMER DATA AND A REQUEST FOR VECTORS RWY 9R ILS. ON VECTORS WITH THE ACFT STABLE WE TURNED TO THE FLT MANUAL TO REVIEW ENG OVERSPD/OVERTEMP AND OVERWT LNDG PROCS. THE CAPT MADE AN UNEVENTFUL OVERWT LNDG. TOTAL FLT TIME 14 MINS. PREDEP ATIS INDICATED MODERATE PRECIP, NNW, 8 NM. WX RADAR SHOWED A FEW AREAS OF RED RETURNS BUT NOT ALONG OUR IMMEDIATE FLT PATH. THE WINDSHEAR WARNING WAS NOT ACCOMPANIED BY ANY IMMEDIATE CHANGES IN AIRSPD OR VERT VELOCITY. THE WINDSHEAR LIGHT AND AUDIBLE WARNING WHILE STILL IN TKOF CONFIGN AND AT ONLY 1000 FT AGL WERE SUFFICIENT CONDITIONS TO WARRANT A RED BOX ESCAPE MANEUVER. ACFT SYS REACTED IN ACCORDANCE WITH THE FLT MANUAL. SUPPLEMENTAL INFO FROM ACN 401841: WX AT ORD WAS APPROX 600 FT, 2 DME WITH SLIGHT TAILWIND FOR RWY 32L T10 INTXN. AREAS OF MODERATE SHOWERS WERE RPTED WITHIN 10 MI OF THE ARPT TO THE W AND NW. CAPT WAS PF. NOTIFIED THE FLT ATTENDANTS FIRST THEN PAX OF OUR NEED TO RETURN. LNDG WAS UNEVENTFUL. FO DID AN EXCELLENT JOB.

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 S80 flight crew experiences low level windshear warning during takeoff at 1000 ft AGL at ord. The escape maneuver overboosted the engines so the flight returns to ord as emergency traffic.