What was found
DURING TAXI OUT, CREW PERFORMED TR CHECK. LT THRUST REVERSER DEPLOYED NORMALLY WITH APPROPRIATE ANNUNCIATOR LIGHT SEQUENCE. RT THRUST REVERSER COULD NOT BE VERIFIED TO DEPLOY AND ASSOCIATED LIGHTS ON RT PANEL DID NOT ILLUMINATE. RT THRUST REVERSER PIGGYBACK LEVER CLOSED AND RT ENGINE SPOOLED DOWN. RT ENGINE BOOST PUMP TURNED ON, AS WELL AS ALL THE ASSOCIATED ANNUNCIATOR LIGHTS FOR A RT ENGINE FAILURE. BLUE COLORED SMOKE WAS SEEN EMITTING FROM RT ENGINE BY GROUND CREW. INVESTIGATED AND FOUND THRUST REVERSER THROTTLE CONTROL LEVER HITTING THROTTLE LEVER BRACKET REPOSITION BRACKET. OPS CHECK SEVERAL TIME DURING TAXI OPS CHECKED GOOD WORK DONE IAW AMM 76-10-00.