A B737-800 ON LNDG ROLL AT MDST ENCOUNTERED WET CONCRETE DUST RESIDUE FROM RWY WORK. ACFT WAS TAKEN OUT OF SVC AT THE NEXT STATION.

Narrative

WE FLEW ACFT INTO MDST THE PREVIOUS NIGHT; IMMEDIATELY AFTER A HVY RAIN SHOWER AND WENT TO LAYOVER UNEVENTFULLY. ON THAT LNDG; THE RWY APPEARED DISCOLORED ALONG ABOUT 2000 FT OF APCH END CTRLINE. THE SAME NOTED PREVIOUS WEEK. THIS TIME THE HVY RAIN SHOWER PRIOR TO LNDG HAD CREATED WHAT WAS LATER IDENTED AS CONCRETE CUTTING RESIDUE WHICH HAD TURNED TO CONCRETE MUD. THIS WAS UNKNOWN TO US AT THE TIME OF LNDG. WE PROCEEDED TO THE LAYOVER UNEVENTFULLY. THE COMPANY DOES NOT REQUIRE A PLT POSTFLT AT MDST. MECHS ARE NOT ALWAYS ON SCENE AT OUR ARR; BUT DO THEIR WORK THE NEXT MORNING BEFORE WE ARRIVE FROM HOTEL. ON RETURN TO THE ARPT IN THE MORNING; THE FO PREFLT REVEALED THE ACFT WAS COVERED IN THE CONCRETE MUD -- ENG #1; NOSE GEAR AREA; MAIN GEAR; ACFT BOTTOM; INLETS; LEADING EDGE DEVICES; LIGHTS; ETC. CONSULTATION WITH COMPANY DISPATCH; AND ON SCENE MECHS RESULTED IN PLAN: WASH DOWN ACFT; INSPECT; START ENGS; WORK FLT CTLS; WHEN SATISFIED MECHS TO SIGN OFF LOG ENTRY; AND US TO FLY TO MIA. THIS TOOK ABOUT 2 HRS. THE RWY WAS DRY AT THE TIME AND POSED LIMITED THREAT (POTENTIAL FOR CHUNKS TO FLY OFF AS ACFT ROLLED OVER IT) AND WAS TO BE WASHED DOWN BY FIRE TRUCK LATER. ACCOMPLISHED ALL EXCEPT THE RWY WASH DOWN. ONLY ABNORMAL ACFT INDICATION AIRBORNE WAS HIGH VIBRATION INDICATION ON ENG #1. UPON ARR MIA; MECH REVIEWED PHOTOS WE TOOK OF THE ACFT AND LOG ENTRIES AND DECIDED TO TAKE ACFT OTS FOR FULL INSPECTION.