What was found
TRIP ID NR 1049878 WHILE CLIMBING THROUGH FL 280 THE CREW HEARD A (CLUNK) IN THE CENTER CONSOLE AND THE RT THRUST REVERSER DEPLOY ANNUNCIATOR ILLUMINATED. THRUST REVERSER EMERGENCY STOW SWITCH WAS PUSHED AND THRUST REVERSER CONTROL CIRCUIT BREAKER WAS PULLED. WHILE AIRCRAFT WAS BEING DIVERTED THE THRUST REVERSER DEPLOY LIGHT EXTINGUISHED AS THE AIRCRAFT DESCENDED THROUGH APPROXIMATELY FL 200. MAINTENANCE ISSUED MEL 78-01 FOR THE THRUST REVERSER SYSTEM. ON 23 JULY, 2006 MAINTENANCE REPLACED THE NR 2 ENGINE THRUST REVERSER DEPLOY SWITCH. NO DEFECTS WERE NOTED DURING OPERATIONAL CHECKS AND THE AIRCRAFT WAS RETURNED TO SERVICE.