As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CMH TO CMH - DURING CLIMB-OUT FROM CMH, THE CREW RECEIVED AN E1 REVERSER DISAGREE MESSAGE ON EICAS. THE CREW LEVELED OFF, FOLLOWED THE APPROPRIATE QRH CHECKLISTS, AND E1 WAS SHUTDOWN. THE AIRCRAFT THEN LANDED AT CMH WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT THE E1 REVERSER AND FOUND THAT THE UPPER AND LOWER PIVOT DOOR ACTUATORS WERE OUT OF ADJUSTMENT. AFTER ADJUSTING THE ACTUATORS, THE THRUST REVERSER OPERATED NORMALLY.