As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CA SIDE MAIN GEAR DOES NOT RETRACT INDICATION SWITCHED BETWEEN YELLOW TRANSITION AND WHITE UP INDICATIONS, BUMPING HEARD FROM LEFT MAIN AFTER REST OF THE LANDING GEAR RETRACTED NO EICAS MESSAGE DISPLAYED. REMOVED AND REPLACED LEFT MLG UPLOCK BOX IAW AMM 32-31-03. OPS AND LEAK CHECKED GOOD.