As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE ON ARRIVAL. BOTH MAIN LANDING GEAR WOULD NOT COME DOWN. PULLED THE MANUAL RELEASE HANDLE AND GEAR CAME DOWN VIA THE QRH. (FLT#7392) CLOSED REMOVED AND REPLACED THE MAIN LANDING GEAR SELECTOR VALVE IAW AMM.PERFORMED MULTIPLE SUCCESSFUL GEAR SWINGS, OPS AND LEAK CHECK GOOD.