As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE APPEARED IN COCKPIT AND CABIN ON DEPARTURE FROM DCA. THE RT PACK WAS SHUT OFF AND THE SMOKE CLEARED. THE FLIGHT WAS CONTINUED TO EWR WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND RT OIL FILLED WATER SEPARATOR VALVE LEAKING OIL. THE VALVE WAS REMOVED AND REPLACED. IN ADDITION, THE WATER SEPARATOR BAG WAS REPLACED. LEAK AND OPERATIONAL CHECKS WERE GOOD.