What was found
UPON POWER FOR T/O, NR 3 ENG REVERSER UNLOCK LIGHT ILLUMINATED. ABORTED T/O AND RETURNED TO GATE FOR MX. THRUST REVERSER WAS DEFERRED PER MEL PROCEDURES. DEFERRAL WAS CLEARED ON 1/2/97. REMOVED AND CLEANED NR 3 ENG'S THRUST REVERSER STOW/DEPLOY SWITCHES. REINSTALL CANNON PLUGS, GROUND TEST THRUST REVERSER (NO FAULTS NOTED). A/C RETURNED TO SERV. A/C EXPERIENCED AN ADDITIONAL FAULT (UNLOCK LIGHT ILLUMINATED DURING T/O ROLL) ON 2/16/97. MALFUNCTION IDENTIFIED AS 'BLACK SHELL' TO CANNON PLUG ON LWR, RT LOCK ACT STOW SWITCH WAS LOOSE. SHIELD WAS CONTACTING ACT BODY. CANNON PLUG WAS CORRECTED, GROUND TESTS WERE PERFORMED. A/C WAS RETURNED TO SERV. (M)