Narrative:

On approximately 20 mi final approach to runway 21, the windshear fail annunciator light came on for approximately 10 seconds, then went out for remainder of the flight. At approximately 3000 ft on approach we received 2 windshear warnings, (both aural and visual) thrust levers were advanced to mechanical stops (standard procedure) and a go around initiated. Thrust levers were at mechanical stops for approximately 10 seconds. During go around we saw minor airspeed fluctuations of +/-5 KTS. Engine instruments were all normal after thrust levers were reduced to normal range. We remained in the pattern for a second approach and uneventful landing. There was no thunderstorm activity in the area. The aircraft required a double engine change. I still do not know if the warnings were false or that we climbed out of the windshear area before we actually encountered it.

Related reports:

Google
 

Original NASA ASRS Text

Title: DC9 CREW FOLLOWED GPWS WINDSHEAR GUIDANCE.

Narrative: ON APPROX 20 MI FINAL APCH TO RWY 21, THE WINDSHEAR FAIL ANNUNCIATOR LIGHT CAME ON FOR APPROX 10 SECONDS, THEN WENT OUT FOR REMAINDER OF THE FLT. AT APPROX 3000 FT ON APCH WE RECEIVED 2 WINDSHEAR WARNINGS, (BOTH AURAL AND VISUAL) THRUST LEVERS WERE ADVANCED TO MECHANICAL STOPS (STANDARD PROC) AND A GAR INITIATED. THRUST LEVERS WERE AT MECHANICAL STOPS FOR APPROX 10 SECONDS. DURING GAR WE SAW MINOR AIRSPD FLUCTUATIONS OF +/-5 KTS. ENG INSTS WERE ALL NORMAL AFTER THRUST LEVERS WERE REDUCED TO NORMAL RANGE. WE REMAINED IN THE PATTERN FOR A SECOND APCH AND UNEVENTFUL LNDG. THERE WAS NO TSTM ACTIVITY IN THE AREA. THE ACFT REQUIRED A DOUBLE ENG CHANGE. I STILL DO NOT KNOW IF THE WARNINGS WERE FALSE OR THAT WE CLBED OUT OF THE WINDSHEAR AREA BEFORE WE ACTUALLY ENCOUNTERED IT.

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.