As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE FROM DCA AT 8000 MSL RECEIVED THE PITCH TRIM 1-2 INOP ON THE EICAS. MAIN AND BACKUP TRIP CONFIRMED INOP BY TRIM SWITCHES. COMPLETED EMERGENCY CHECKLIST AND EMERGENCY WAS DECLARED INTO IAD. EMERGENCY EQUIPMENT WAS STANDING BY AND MADE UNEVENTFUL LANDING. NO FURTHER INFO AT THIS TIME. MAINTENANCE INVESTIGATED THE PROBLEM AND RESET PITCH TRIM SYSTEM 1 & 2 AND OPERATIONAL CHECK WAS SATIFACTORY PER AMM 27-40-00.