Narrative:

Upon touchdown on runway 30L at cps, aircraft immediately slid off left side of runway in about a 20 degree right yaw. Departed runway about 1500 ft down and skidded 2500 ft parallel to runway, and then got aircraft back on runway. No one was injured and only minor damage to aircraft. Temperature at time of occurrence was reported about 35 degrees F, however, it was found out later that low ground temperatures hovered at freezing. Dew point/temperature spread 1 degree. Wind 4 KTS quartering tailwind. Snow and ice had been removed from active runway several days before but remained in low piles at sides of runway. ATIS was reporting braking action on unused other runway, but no braking action was given on active runway, leading us to believe braking action good. We later found out that braking action had not been tested for at least 3 hours prior to our landing. We also had heard from the lineman, when we parked, that a lear jet had landed prior to us and had a 'wild ride' and skidded sideways on runway. I guess the lear did not report this to tower and the tower could not see the runway due to fog, so we did not have this information on landing. My guess is that we hit black ice with 1 gear first which yawed us to the right and then we slid off runway. It all happened so fast there was no controling the aircraft until it was off the side of runway. Once in the grass I could control direction of aircraft and parallel runway until I got back on runway.

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Original NASA ASRS Text

Title: RWY EXCURSION AFTER LOSS OF ACFT CTL. NIGHT OP.

Narrative: UPON TOUCHDOWN ON RWY 30L AT CPS, ACFT IMMEDIATELY SLID OFF L SIDE OF RWY IN ABOUT A 20 DEG R YAW. DEPARTED RWY ABOUT 1500 FT DOWN AND SKIDDED 2500 FT PARALLEL TO RWY, AND THEN GOT ACFT BACK ON RWY. NO ONE WAS INJURED AND ONLY MINOR DAMAGE TO ACFT. TEMP AT TIME OF OCCURRENCE WAS RPTED ABOUT 35 DEGS F, HOWEVER, IT WAS FOUND OUT LATER THAT LOW GND TEMPS HOVERED AT FREEZING. DEW POINT/TEMP SPREAD 1 DEG. WIND 4 KTS QUARTERING TAILWIND. SNOW AND ICE HAD BEEN REMOVED FROM ACTIVE RWY SEVERAL DAYS BEFORE BUT REMAINED IN LOW PILES AT SIDES OF RWY. ATIS WAS RPTING BRAKING ACTION ON UNUSED OTHER RWY, BUT NO BRAKING ACTION WAS GIVEN ON ACTIVE RWY, LEADING US TO BELIEVE BRAKING ACTION GOOD. WE LATER FOUND OUT THAT BRAKING ACTION HAD NOT BEEN TESTED FOR AT LEAST 3 HRS PRIOR TO OUR LNDG. WE ALSO HAD HEARD FROM THE LINEMAN, WHEN WE PARKED, THAT A LEAR JET HAD LANDED PRIOR TO US AND HAD A 'WILD RIDE' AND SKIDDED SIDEWAYS ON RWY. I GUESS THE LEAR DID NOT RPT THIS TO TWR AND THE TWR COULD NOT SEE THE RWY DUE TO FOG, SO WE DID NOT HAVE THIS INFO ON LNDG. MY GUESS IS THAT WE HIT BLACK ICE WITH 1 GEAR FIRST WHICH YAWED US TO THE R AND THEN WE SLID OFF RWY. IT ALL HAPPENED SO FAST THERE WAS NO CTLING THE ACFT UNTIL IT WAS OFF THE SIDE OF RWY. ONCE IN THE GRASS I COULD CTL DIRECTION OF ACFT AND PARALLEL RWY UNTIL I GOT BACK ON RWY.

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.