As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF RED GEAR UNLOCK LIGHT REMAINED ON. FLEW FOR APPROX 1 HOUR TO GET BELOW MAX LANDING WEIGHT AND IN THAT TIME THE HYDRAULIC PRESSURE ANNUNCIATOR CAME ON ONE TIME FOR APPROX 1 SECOND. JACKED AIRCRAFT, INSPECTED AND CLEANED UPLOCK SWITCHES IN ALL THREE GEARS AND NO VISUAL DEFECTS WERE NOTED. PERFORMED SEVERAL OPERATIONAL CHECK OF LANDING GEAR FOR PROPER OPERATION AND ALSO NO DEFECTS WERE NOTED. COULDN'T DUPLICATE DISCREPENCY. ALL WORK WAS PERFORMED IAW CE-560XL MM CH. 32-01-00