What was found
DURING CLIMB AT 15K FT, RUMBLING SOUND HEARD AND LT ENG N1 IND 84.8% WITH A SPLIT IN ENG THROTTLES. LT THROTTLE COULD NOT BE PUSHED BACK UP, SO RT THROTTLE WAS PULLED BACK TO MATCH LT ENG'S N1 SPEED. A/C RETURNED FOR MX. LT THRUST REVERSER INBOARD UNLOCK SW FOUND SHORTED TO CLOSED POSITION WHICH CAUSED HYD PRESS TO BE SECURED PRIOR TO INBD T/R ACT TRAVELING TO OVERSTOW POSITION. ALLOWED INBD SIDE OF T/R BUCKETS TO HANG IN AIRSTREAM, AND RETARD LT THROTTLE LVR THRU FEEDBACK CABLE. MX REPLACED LT T/R INBD STOW SW. OTBD T/R ACT FOUND LEAKING AND WAS REPLACED. AN INSPECT OF LT T/R FEEDBACK CABLE ACCOMP WITH NO NOTED DEFECTS. SYSTEM OPS CHECKS GOOD. A/C RETURNED TO SERV.