Narrative:

Sat tower had cleared me to land on runway 12L, while on left base leg. After I turned final, an airlines widebody transport was cleared onto runway 12R and for takeoff. The ATIS had reported wind 150 degrees at 15 KTS. I considered a go around, however, felt wake turbulence would not be a factor if I used full flaps with a touchdown at about the 500 ft point. The landing was made using full flaps. After landing, flaps were raised to minimize wind effect and get weight on the wheels. Subsequently, aircraft veered to right (estimated speed 25 mph). I stopped yaw rotation at approximately 45 degrees to runway heading using left rudder and left brake with left tire in a side skid. I did not use power due to proximity and unknown condition at right edge of runway, i.e., lip, drop off, rough. As left tire slid off side of runway, I elected to stop skid by using full right rudder to yaw plane so that it would roll backward and eliminate side load on tires and landing gear. Aircraft stopped with left gear off runway. Taxied aircraft east on runway 12L to taxiway M. Inspection revealed mud in left wheel fairing (picked up at side of runway) causing friction with tire. Taxied to ramp. No damage to aircraft. Apparently encountered wake turbulence during rollout causing aircraft (conventional gear) to veer to right rapidly.

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Original NASA ASRS Text

Title: SMA SUFFERS JET BLAST ENCOUNTER AND EXPERIENCES LOSS OF ACFT CTL DURING LNDG PROC ROLLOUT. RWY EXCURSION OCCURS.

Narrative: SAT TWR HAD CLRED ME TO LAND ON RWY 12L, WHILE ON L BASE LEG. AFTER I TURNED FINAL, AN AIRLINES WDB WAS CLRED ONTO RWY 12R AND FOR TKOF. THE ATIS HAD RPTED WIND 150 DEGS AT 15 KTS. I CONSIDERED A GAR, HOWEVER, FELT WAKE TURB WOULD NOT BE A FACTOR IF I USED FULL FLAPS WITH A TOUCHDOWN AT ABOUT THE 500 FT POINT. THE LNDG WAS MADE USING FULL FLAPS. AFTER LNDG, FLAPS WERE RAISED TO MINIMIZE WIND EFFECT AND GET WT ON THE WHEELS. SUBSEQUENTLY, ACFT VEERED TO R (ESTIMATED SPD 25 MPH). I STOPPED YAW ROTATION AT APPROX 45 DEGS TO RWY HDG USING L RUDDER AND L BRAKE WITH L TIRE IN A SIDE SKID. I DID NOT USE PWR DUE TO PROX AND UNKNOWN CONDITION AT R EDGE OF RWY, I.E., LIP, DROP OFF, ROUGH. AS L TIRE SLID OFF SIDE OF RWY, I ELECTED TO STOP SKID BY USING FULL R RUDDER TO YAW PLANE SO THAT IT WOULD ROLL BACKWARD AND ELIMINATE SIDE LOAD ON TIRES AND LNDG GEAR. ACFT STOPPED WITH L GEAR OFF RWY. TAXIED ACFT E ON RWY 12L TO TXWY M. INSPECTION REVEALED MUD IN L WHEEL FAIRING (PICKED UP AT SIDE OF RWY) CAUSING FRICTION WITH TIRE. TAXIED TO RAMP. NO DAMAGE TO ACFT. APPARENTLY ENCOUNTERED WAKE TURB DURING ROLLOUT CAUSING ACFT (CONVENTIONAL GEAR) TO VEER TO R RAPIDLY.

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.