Narrative:

While on a coupled approach to runway 32L ord at approximately 1300 ft we encountered an increase in airspeed of 35-40 KTS to 170- 180 KIAS. With the first officer flying, a go around was initiated. While setting go around power, a red windshear light illuminated accompanied by the aural warning. The first officer then advanced the throttles further and called for maximum power. After I reduced power to the go around EPR, attention was then focused on airspeed, pitch attitude and altitude callouts. At approximately 1000 ft AGL the airspeed had diminished to 135-140 KIAS and the aircraft was at 12-15 degree pitch up and descending at 200-300 FPM. At approximately 900 ft AGL, the aircraft began to accelerate and climb normally. After requesting clearance to our alternate, it was relayed to us that ord had closed and that all approachs had been stopped. After refueling and returning to ord for an uneventful landing, I contacted maintenance to discuss the possibility that RPM limits could have been exceeded during the windshear encounter. Maintenance suggested that I make an entry to this effect.

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Original NASA ASRS Text

Title: FLC ON COUPLED ILS APCH TO ORD AT 1300 FT ENCOUNTERED 35 TO 40 KTS AIRSPD INCREASE. THE CREW COMMENCED GAR, THEN RECEIVED WINDSHEAR WARNING AND SUBSEQUENT AIRSPD AND ALT LOSS. UPON RECOVERY THE CREW PROCEEDED TO THEIR ALTERNATE.

Narrative: WHILE ON A COUPLED APCH TO RWY 32L ORD AT APPROX 1300 FT WE ENCOUNTERED AN INCREASE IN AIRSPD OF 35-40 KTS TO 170- 180 KIAS. WITH THE FO FLYING, A GAR WAS INITIATED. WHILE SETTING GAR PWR, A RED WINDSHEAR LIGHT ILLUMINATED ACCOMPANIED BY THE AURAL WARNING. THE FO THEN ADVANCED THE THROTTLES FURTHER AND CALLED FOR MAX PWR. AFTER I REDUCED PWR TO THE GAR EPR, ATTN WAS THEN FOCUSED ON AIRSPD, PITCH ATTITUDE AND ALT CALLOUTS. AT APPROX 1000 FT AGL THE AIRSPD HAD DIMINISHED TO 135-140 KIAS AND THE ACFT WAS AT 12-15 DEG PITCH UP AND DSNDING AT 200-300 FPM. AT APPROX 900 FT AGL, THE ACFT BEGAN TO ACCELERATE AND CLB NORMALLY. AFTER REQUESTING CLRNC TO OUR ALTERNATE, IT WAS RELAYED TO US THAT ORD HAD CLOSED AND THAT ALL APCHS HAD BEEN STOPPED. AFTER REFUELING AND RETURNING TO ORD FOR AN UNEVENTFUL LNDG, I CONTACTED MAINT TO DISCUSS THE POSSIBILITY THAT RPM LIMITS COULD HAVE BEEN EXCEEDED DURING THE WINDSHEAR ENCOUNTER. MAINT SUGGESTED THAT I MAKE AN ENTRY TO THIS EFFECT.

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.