What was found
ABNORMAL NR 1 THRUST REVERSER UNLOCK ON ECAM. DIVERTED IAW QRH. NO ADVERSE YAW OR ROLL ASSOCIATED WITH THRUST REVERSER UNLOCK. ENGINE WAS NOT SHUTDOWN, KEPT AT IDLE POWER. FOUND PIN J ON CONNECTOR D5003P AT J-BOX SHORTED BETWEEN THE CONNECTOR CHASSIS AND PIN D WHICH IS CHANNEL B FOR LEFT RVDT AND PROVIDES THE FADEC WITH REVERSER POSITION FEEDBACK. REPAIRED PIN PER A300 ESPM 20-44-00. REACTIVATED T/R PER 78-32-00-09-0AND OPERATED PER A300 JRH. OPS TESTED NORMAL. OPERATED ENGINE PER JRH ALL OPS NORMAL. AIRCRAFT OKAY FOR SERVICE