As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE WARNING ON LEFT MAIN LANDING GEAR. RAN QRH AFTER CYCLING GEAR 1 TIME GEAR SHOWED DOWN 3 GREEN. LANDING AND TAXI IN NORMAL. (FLT#4799) FO: 05/15/2019 CLOSED REMOVED AND REPLACED LT MLG SIDE STAY ACTUATOR IAW AMM. OPS CHECK GOOD AT THIS TIME. NO LEAKS DETECTED.