What was found
WHILE PERFORMING A NON RELATED MAINTENANCE GROUND RUN, ON THE TAXI BACK TO THE HANGER A VIBRATION OCCURED FROM THE RT MAIN LANDING GEAR. AFTER SHUT DOWN AN INSPECTION OF THE RT MAIN GEAR ASSEMBLY FOUND THE BOLT (PN 691308) HOLDING THE TWO TORQUE LINKS TOGETHER WAS BROKEN. THE BOLT HALVES WERE FROZEN INTO THE LINK AND WOULD NOT TURN, DUE TO INADEQUATE LUBRICATION. AFTER REMOVAL, THE BOLT WAS INSPECTED AND FOUND TO RUSTED OVER HALF WAY ACROSS THE DIAMETER OF THE BOLT. THE BOLT TIME SINCE NEW WAS 1530.7 HOURS.