B757-200 FLT CREW EXPERIENCES LATERAL CTL DIFFICULTY ON XWIND LNDG AT TPA.

Narrative

ON FINAL APCH; TWR RPTED WINDS 008 DEGS AT 16 KTS. NO GUSTS OF WINDSHEAR RPTED. REF SPD FOR 188000 LBS WAS 128 KTS. SET TARGET OF 136 KTS AND ADDED ABOUT 4-5 EXTRA KTS TILL CLOSE TO FLARE. ALL NORMAL XWIND LNDG SOP'S FOLLOWED. ABOUT 4 FT ABOVE RWY; ACFT ROLLED L; BOUNCED OFF L MAIN THEN ROLLED R; BOUNCED OFF R MAIN; THEN ROLLED L AND L MAIN TOUCHED AGAIN BEFORE ALL WHEELS ON RWY. WHOLE TIME I WAS REACTING INSTINCTIVELY BUT WAS UNABLE TO ARREST ROLL. IT FELT LIKE WE WERE IN A VORTEX BUT NO WAKE TURB WAS RPTED AHEAD OF US. ACFT STAYED ON CTRLINE. RPTED WINDSHEAR TO TWR. ON GND; TALKED TO STATION MGR. LATER CALLED FLT OPS DUTY MGR; DISPATCH AND MAINT. AN INSPECTION OF ACFT WAS ORDERED BY MAINT. IN OVER 3 DECADES OF FLYING; AND WITH MUCH EXPERIENCE WITH HIGH; GUSTY XWINDS; I'VE NEVER ENCOUNTERED A LOSS OF ROLL CTL LIKE THIS. SUPPLEMENTAL INFO FROM ACN 612145: ON FINAL; WE DECIDED TO ADD 8 KTS TO REF BECAUSE OF A STEADY 30-40 DEG R XWIND OF 17 KTS. ON SHORT FINAL; TWR CTLR AGAIN RPTED A STEADY 16 KT WIND AT 030 DEGS. CAPT CARRIED ABOUT 5 EXTRA KTS MOST OF THE WAY DOWN FINAL AND THE WINDS DID NOT SEEM TO BE GUSTING. WE COULD TELL THE WINDS WERE STRONG FROM OUR CRAB HDG OFF THE LOC HDG. VERY SUDDENLY AS WE STARTED TO GET INTO THE FLARE; THE WING DIPPED TOWARD THE RWY. CAPT COUNTERED WITH AILERON IMMEDIATELY. THE WINGS ROCKED BACK AND FORTH APPROX 2 MORE TIMES AS THE WHEELS TOUCHED SEPARATELY ONE AFTER THE OTHER WITH A BOUNCE AND THEN 2 MORE TOUCHES BY BOTH MAINS. THE ENCOUNTER HAPPENED SO CLOSE TO THE GND THERE WAS NO TIME TO GO AROUND. CAPT KEPT THE ACFT ALIGNED WITH THE CTRLINE THE ENTIRE TIME. AFTER DISCUSSION; WE DIDN'T THINK IT WAS A HARD LNDG; HOWEVER; DEFINITELY FIRM.