As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MAIN GEAR WOULD NOT RECYCLE AFTER CLIMB-OUT. RECYCLED GEAR, LEFT MAIN WOULD NOT RECYCLE. DIVERTED LHR, OVERWEIGHT LANDING. CHECK VALVE IN TRUCK POSITION ACTUATOR PRESSURE LINE WAS MALFUNCTIONING, ALLOWING BYPASS AND PREVENTING UNLOCK ACTUATORS TO BUILD UP UNLOCK PRESSURE. REPLACED TRUCK POSITION ACTUATOR.