CAPT OF ACR SMT ACFT LOST CTL OF ACFT DURING A GUSTY XWIND SHEAR LNDG.

Narrative

TWR CLRED US FOR VISUAL APCH R TFC FOR RWY 10R. FO MADE GOOD APCH FROM TURB AND STRONG XWIND. IT WAS LATER RPTED AFTER LNDG THAT WIND WAS GUSTING TO 20 MPH AND SHIFTING FROM 150 DEGS TO 240 DEGS AND ISSUED A WINDSHEAR ALERT. THESE STRONG WINDS INFLUENCED THE NEXT STAGE OF EVENTS. ON TOUCHDOWN; THE NOSE OF ACFT POINTED SLIGHTLY TO R AND LNDG WAS APPROX 3-4 FT L OF CTRLINE. DUE TO COMPANY POLICY ON SMT ACFT; ONLY THE CAPT MUST MAKE REST OF LNDG AFTER TOUCHDOWN; FO TRANSFERRED CTLS TO CAPT. FO WAS TOLD TO HOLD FULL R AILERON AND CAPT HAD REST OF CTLS. APPROX 1 SECOND PRIOR TO CAPT TAKING CTLS; FO TOOK FT OFF RUDDER PEDALS AND PEDALS WENT FULL R RUDDER. ACFT CTLS NOW IN CAPT'S CTL; THE ACFT WAS VEERING OFF RWY TO R. CAPT IMMEDIATELY BROUGHT IN FULL REVERSE BOTH PROPS AND THEN USED DIFFERENTIAL REVERSE AND FULL L RUDDER. ACFT STILL KEPT VEERING TO R UNCTLABLE. CAPT APPLIED DIFFERENTIAL BRAKING AS ACFT SLOWED TO APPROX 30 KTS AND WAS NOW 8-10 FT R OF CTRLINE AND 2-4 FT FROM R EDGE OF RWY. ACFT STILL WAS UNCTLABLE VEERING R SLIGHTLY. CAPT ENGAGED NOSEWHEEL STEERING BUTTON PWR LEVER AND NEUTRALIZED PEDALS. THE NOSEWHEEL STEERING DID NOT ENGAGE SINCE CAPT APPLIED L RUDDER AND THERE WAS NO RESPONSE FROM NOSEWHEEL STEERING (NOSEWHEEL STEERING IS CONNECTED TO RUDDER PEDALS WHEN ENGAGED). THE ACFT INCREASED THE SEVERITY OF VEERING TO THE R AND CAPT APPLIED FULL L AND R BRAKES AND ACFT SKIDDED OFF EDGE OF RWY INTO GRASS. WITH NOSEWHEEL IN GRASS; ACFT PIVOTED ABOUT NOSE CLOCKWISE AND CAME TO REST APPROX 110 DEGS TO R OF RWY HDG. NO DAMAGE TO ACFT; 1 MINOR INJURY TO PAX. MAINT FOUND DEFECT IN NOSEWHEEL STEERING. CONTRIBUTING FACTORS TO INCIDENT: FO LOW TIME IN ACFT. TRANSFER OF CTLS WAS NOT DONE IN A POSITIVE MANNER; STRONG XWIND TO CHANGING QUARTERING TAILWIND THAT WAS GUSTING. NOT GIVEN CURRENT WX CONDITIONS BY TWR PRIOR TO LNDG; CAPT NOT BEING MENTALLY PREPARED FOR A NO NOSEWHEEL LNDG POSSIBILITY; FAILURE OF NOSEWHEEL STEERING TO ENGAGE; AND CAPT SHOULD HAVE BRIEFED PRIOR FLT ON METHOD TO TRANSFER CTLS.