What was found
DURING A SCHEDULED MAINTENANCE GEAR SWING THE RT GEAR UP-LOCK HOOK EXTEND HOSE ASSY, BLEW A HOLE IN IT ABOUT .5 INCH FROM THE SWEDGED FITTING HOSE END. THIS IS THE HOSE END THAT ATTACHES TO THE UP-LOCK ACTUATOR FITTING. NO MAINTENANCE PERSONNEL WERE HURT OR DAMAGE TO AIRCRAFT, BUT THE MAIN WHEEL ASSY WAS REPLACED DUE TO SKYDROL CONTAMINATION. NEW HOSE ASSY INSTALLED.