As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 7306 - IAD-BUF - DURING CRUISE, MADE AN UNSCHEDULED LANDING AT IAD DUE TO BOTH RMUS INOPERATIVE. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE REMOVED AND REPLACED BOTH RIGHT AND LEFT RMU OPS CHECK GOOD. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)