Narrative:

Divert to bwi because of frontal passage which resulted in reports of 30 KT windshear at iad. On approach at bwi, encountered windshear, which resulted in a flap overspd for flaps 5 degrees. We did a go around and evaluated our options which took into consideration our decreasing fuel situation, WX at bwi, ELT and decided to make another approach at bwi. We encountered significant tailwind on final, expecting wind to shift to a headwind. Landed long (but still able to get stopped with plenty of runway) due to extra airspeed, tailwind and failure to get final flap selection of 30 degrees instead of 25 degrees. It was a very rapid and dynamic set of events, some fast decisions were made. In retrospect, we would not have changed our landing airport but an inquiry about latest surface wind would have been in order. I noticed flaps at 25 degrees at about 150 ft, called for flaps 30 degrees. Captain said roger, flaps 30 degrees, but never selected flaps 30 degrees. Flaps 25 degrees is a legal landing flap for aircraft, but not the best in this situation. This oversight contributed to our landing right on the limit of the touchdown zone.

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Original NASA ASRS Text

Title: ACFT ENCOUNTERED SEVERE WINDSHEAR ON FINAL APCH AND ABANDONED THE APCH. DURING THE SECOND APCH, WINDSHEAR CAUSED AIRSPD INCREASES WHICH RESULTED IN INDICATED AIRSPDS ABOVE FLAP LIMIT SPDS. ACFT LANDED WITHIN THE TOUCHDOWN ZONE.

Narrative: DIVERT TO BWI BECAUSE OF FRONTAL PASSAGE WHICH RESULTED IN RPTS OF 30 KT WINDSHEAR AT IAD. ON APCH AT BWI, ENCOUNTERED WINDSHEAR, WHICH RESULTED IN A FLAP OVERSPD FOR FLAPS 5 DEGS. WE DID A GAR AND EVALUATED OUR OPTIONS WHICH TOOK INTO CONSIDERATION OUR DECREASING FUEL SIT, WX AT BWI, ELT AND DECIDED TO MAKE ANOTHER APCH AT BWI. WE ENCOUNTERED SIGNIFICANT TAILWIND ON FINAL, EXPECTING WIND TO SHIFT TO A HEADWIND. LANDED LONG (BUT STILL ABLE TO GET STOPPED WITH PLENTY OF RWY) DUE TO EXTRA AIRSPD, TAILWIND AND FAILURE TO GET FINAL FLAP SELECTION OF 30 DEGS INSTEAD OF 25 DEGS. IT WAS A VERY RAPID AND DYNAMIC SET OF EVENTS, SOME FAST DECISIONS WERE MADE. IN RETROSPECT, WE WOULD NOT HAVE CHANGED OUR LNDG ARPT BUT AN INQUIRY ABOUT LATEST SURFACE WIND WOULD HAVE BEEN IN ORDER. I NOTICED FLAPS AT 25 DEGS AT ABOUT 150 FT, CALLED FOR FLAPS 30 DEGS. CAPT SAID ROGER, FLAPS 30 DEGS, BUT NEVER SELECTED FLAPS 30 DEGS. FLAPS 25 DEGS IS A LEGAL LNDG FLAP FOR ACFT, BUT NOT THE BEST IN THIS SIT. THIS OVERSIGHT CONTRIBUTED TO OUR LNDG RIGHT ON THE LIMIT OF THE TOUCHDOWN ZONE.

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.