What was found
DURING CLIMB-OUT FROM MDT, UPON GEAR RETRACTIO NLEFT MAIN GEAR UNSAFE, NOSE, AND RIGHT MAIN DOOR LIGHTS REMAINED ILLUMINATED. GEAR RETRACTED FULLY AFTER APPROXIMATELY 1 MINUTE. AIRCRAFT RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT AND FOUND A HYDRAULIC LINE LEAK IN NOSE GEAR WELL. REMOVED AND REPLACED THE HYDRAULIC LINE TO DRAG STAY ACTUATOR AND O-RING IAW DHC PROCEDURES. RETRACTION TEST SATISFACTORY. A/C RETURNED TO SERVICE. (M)