As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MLG WOULD NOT COME DOWN VIA GEAR HANDLE. MANUALLY EXTENDED MAIN GEAR THEN RECEIVED THREE DOWN AND LOCKED INDICATIONS. CYCLING OF NORMAL GEAR HANDLE DID NOT WORK. REMOVED AND REPLACED MLG PRIORITY MODULAR VALVE AND UPLOCK ACTUATOR PER MM.