As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)ON CLIMB LANDING GEAR WOULD NOT RETRACT. AIRCRAFT RETURNED TO BASE. MAINTENANCE CHECK REVEALED MAIN LANDING DOORS WERE NOT FULLY CLOSED. MAINTENANCE ACTION INVOLVED CHANGING MLG SELECTOR VALVE AS PER AMM 32-31-0. BOTH LGCIU TESTED AND GEAR SWING WAS NORMAL.