What was found
PILOTS REPORTED THAT AFTER TAKEOFF THE GEAR HANDLE WAS MOVED TO THE UP POSITION AND 3 GREEN LIGHTS EXTINGUISHED AND THE INTRANSIT LIGHTS STAYED ILLUMINATED. PILOTS CONFIRMED GEAR DID NOT COME UP. PILOTS MANUALLY PUMPED THE GEAR DOWN. MX FOUND DAMAGED HOSES FOR THE LT RETRACT ACTUATOR. MX REMOVED AND REPLACED THE LINES, SERVICED HYD SYS AND BLED THE SYS FOR THE LT SIDE. REFERENCE 1900D MM 32-30-00 AND 32-30-10. OPS CHECKS WERE GOOD. PN 101-388017-5 AND 101-388016-7 WERE THE LINES INVOLVED WITH THE SITUATION.