As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 360 IN CRUISE NR 1 AND NR 3 THROTTLES RAPIDLY CAME TO IDLE WHILE NR 2 STAYED AT ITS CRUISE SETTING (95.4). DISCONNECTED AUTO THROTTLES AND TRIED TO MARRY THROTTLES. NR 2 WAS FROZEN AND REMAINED FROZEN THROUGHOUT FLIGHT. IN DESCENT HAD TO SHUTDOWN ENG NR 2 DUE TO STUCK THROTTLE AT HIGH POWER SETTING. ALL OTHER ENGINE LIMITATIONS NORMAL. REMOVED AND REPLACED NR 2 ENGINE THROTTLE PUSH-PULL CABLE IAW AMM 76-11-01-2.