As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH WHEN GEAR WAS SELECTED DOWN RECEIVED A GEAR DISAGREE WARNING MESSAGE AND BOTH MAINS DID NOT EXTEND. MANUALLY EXTENDED GEAR. FLIGHT 5841. REPLACED MAIN GEAR SELECTOR VALVE IAW AMM 32-32-10. REPLACED MAIN GEAR PRIORITY VALVE IAW AMM 32-32-15. OPS CHECK GOOD. P/N 750005000, S/N OFF 0036T, P/N 4619-3.