As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALL GEAR DOOR AMBER LIGHTS REMAINED ILLUMINATED AFTER TAKEOFF. RAN QRH, PERFORMED ALTERNATE GEAR EXTENSION. AIRCRAFT NUMBER TWO ENGINE DRIVEN HYD PUMP HAD BEEN CHANGED AND BLED PRIOR TO TAKEOFF. SUSPECTED AIR IN SYSTEM. AIRCRAFT WAS REPOSITIONED AS A MAINTENANCE FERRY FLIGHT FROM FAR TO DEN. MAINTENANCE PERFORMED ADDITIONAL BLEEDING OF THE NUMBER 2 HYDRAULIC SYSTEM AND AIRCRAFT WAS RETURNED TO SERVICE.