What was found
ACFT 255GL - AIR RETURN - FLIGHT 5063 - PILOTS REPORTED GEAR WOULD NOT MOVE TO THE UP POSITION. TRIED J-HOOK A COUPLE OF TIMES AND IT WOULDN’T COME UP AT FIRST, THEN THE HANDLE MOVED UP BUT THE GEAR WOULDN’T COME UP. LANDING GEAR RELAY CIRCUIT BREAKER POPPED. PUSHED IN , GEAR CAME UP, THEN PUT BACK DOWN AND CIRCUIT BREAKER POPPED AGAIN. MX REMOVED, CLEANED AND RE-INSTALLED CONNECTOR TO RT MAIN GEAR ACTUATOR. PERFORMED 10 EXTENSION/RETRACTIONS GEAR CYCLES. ALL CHECKS GOOD IAW 1900D MM 32-30-00. INSPECTED WIRING BEHIND GEAR HANDLE AND ON AIRFRAME SIDE OF RT MAIN GEAR ACTUATOR, CONNECTOR. NO DISCREPANCIES NOTED. MX THEN FOUND AND REPAIRED CHAFED WIRE NRG15G22 AT APPROXIMATELY POSITION SEAT 3A IN SIDEWALL IAW GMM 9.3.0. OPERATIONAL CHECKS GOOD IAW 1900D 32-30-00. (S)