As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 3015 - CRW-DCA - SHORTLY AFTER DEPARTURE, THE CABIN AND COCKPIT FILLED WITH SMOKE. THE AIRCRAFT RETURNED TO CRW AND LANDED WITHOUT INCIDENT. PERFORMED GROUND RUN WITH LEFT PACK ONLY, COULD NOT DUPLICATE, MEL 21-1. AT RON, REMOVED AND REPLACED NR 3 ENGINE. (M)