As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RDM - FLIGHT 2191 - ON SHUTDOWN AT THE GATE, RAMP NOTICED SMOKE FROM THE TOP OF NR 1 ENGINE. MAINTENANCE CHECKED NACELLE AND ENGINE AREA AND FOUND NO SOURCE FOR THE SMOKE. FOUND SOME ICE IN THE COWL DRAIN MAST AND THAWED OUT. PERFORMED ENGINE RUNS AT TEMPERATURE AND SHUT DOWN WITH NO SMOKE NOTED. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.