As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3492 - ON CLIMB-OUT FROM STC, THE LANDING GEAR DIDN'T REMAIN UP AND LOCKED AFTER GEAR RETRACTION. THE CREW CYCLED THE GEAR AND THE GEAR REMAINED UP AND LOCKED. MAINTENANCE WAS UNABLE TO DUPLICATE THE DISCREPANCY. MAINTENANCE LUBED THE GEARS AND CHANGED THE MAIN HYDRAULIC FILTER AS A PRECAUTION. (M)