As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, GEAR UPLATCH CHECK FAILURE. REMOVED AND REPLACED MAIN GEAR CONTROL VALVE IAW M/M 32-32-1 RIGGED IAW M/M 32-31-0 P208. NO LEAKS NOTED ON PRESSURE CHECKS. PERFORMED EXTENSION AND RETRACT ON CHECKS PER M/M 32-30-0. CYCLED GEAR THREE TIMES NO FURTHER PROBLEMS NOTED ON GEAR SWING.