Narrative:

I was captain and the PF on flight cvg to buf. The WX forecast for buffalo arrival was indicative of strong winds of 240 degrees at 24 KTS with gusts to 35 KTS. Anticipated runway was runway 23 at buffalo. On ILS approach, moderate turbulence was encountered all the way down final with plus and minus airspeed deviations of 10-15 KTS. It should be noted that prior to the event, approach airspeed was vref +20-30 KTS and power was still at approach power setting. Just prior to touchdown, a very strong gust destabilized the aircraft with excessive yaw and excessive sink rate. I applied go around thrust. The aircraft continued to sink until the main wheels touched the runway in the process of going around. The aircraft's windshear warning system did not activate due to the immediate nature of the event and the subsequent inhibiting of the system when go around was selected. Due to recognition of windshear in the landing zone and the leveloff turbulence in the area, I decided to divert the flight to syracuse. A PIREP was given to ATC. On the ground at syracuse, I received continual wind reports from buffalo tower, relayed through the flight dispatcher. When winds had decreased to an acceptable level, I continued the flight back to buffalo and landed safely.

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Original NASA ASRS Text

Title: FLC OF LGT ENCOUNTERS WINDSHEAR ON FINAL AND EXECUTES GAR. DIVERTS TO ANOTHER ARPT.

Narrative: I WAS CAPT AND THE PF ON FLT CVG TO BUF. THE WX FORECAST FOR BUFFALO ARR WAS INDICATIVE OF STRONG WINDS OF 240 DEGS AT 24 KTS WITH GUSTS TO 35 KTS. ANTICIPATED RWY WAS RWY 23 AT BUFFALO. ON ILS APCH, MODERATE TURB WAS ENCOUNTERED ALL THE WAY DOWN FINAL WITH PLUS AND MINUS AIRSPD DEVS OF 10-15 KTS. IT SHOULD BE NOTED THAT PRIOR TO THE EVENT, APCH AIRSPD WAS VREF +20-30 KTS AND PWR WAS STILL AT APCH PWR SETTING. JUST PRIOR TO TOUCHDOWN, A VERY STRONG GUST DESTABILIZED THE ACFT WITH EXCESSIVE YAW AND EXCESSIVE SINK RATE. I APPLIED GAR THRUST. THE ACFT CONTINUED TO SINK UNTIL THE MAIN WHEELS TOUCHED THE RWY IN THE PROCESS OF GOING AROUND. THE ACFT'S WINDSHEAR WARNING SYS DID NOT ACTIVATE DUE TO THE IMMEDIATE NATURE OF THE EVENT AND THE SUBSEQUENT INHIBITING OF THE SYS WHEN GAR WAS SELECTED. DUE TO RECOGNITION OF WINDSHEAR IN THE LNDG ZONE AND THE LEVELOFF TURB IN THE AREA, I DECIDED TO DIVERT THE FLT TO SYRACUSE. A PIREP WAS GIVEN TO ATC. ON THE GND AT SYRACUSE, I RECEIVED CONTINUAL WIND RPTS FROM BUFFALO TWR, RELAYED THROUGH THE FLT DISPATCHER. WHEN WINDS HAD DECREASED TO AN ACCEPTABLE LEVEL, I CONTINUED THE FLT BACK TO BUFFALO AND LANDED SAFELY.

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.