As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED NUMBER 1 ENGINE HAD N2 VIBRATION WITH ITT OF 998 DEGREES AFTER TAKEOFF FROM DCA. CREW COMPLIED WITH QRH, SHUT DOWN LEFT ENGINE, DIVERTED TO IAD AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED, REMOVED AND REPLACED LEFT ENGINE AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICE.