As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ABOVE 10 K FEET . RECEIVED A RED U/L REVERSER LIGHT NR 1 ENG. ACCOMPANIED BY SIGNIFICANT VIBRATIONS. SHUTDOWN ENG IAW QRH. ON LANDING, LIGHT TURNED TO AMBER. EMERGENCY DECLARED RTB ON INSPECTION OF # 1 THRUST REVERSER, FOUND O/B CENTER DRIVER UNIT BRAKE HANDLE NOT IN STOWED. STOWED BRAKE HANDLE & CARRIED OUT WINDMILL INSP IAW AMM 72-00-05-200-831. NO DISCREPANCIES NOTED. R & R ENG 1 L/H CDU. RIG/OPS CK OK.