As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AT CRUISE LEVEL HEARD A CLUNK AND FELT A BUMP, FROM THE FORWARD SECTION OF THE AIRCRAFT. SHORTLY AFTER THE WARNING MESSAGE GEAR DISAGREE AND CAUTION MESSAGE PROX SYS CHAN WERE DISPLAYED ON EICAS. COULD ALSO SEE THE GEAR INDICATORS APPEARING, DECIDED TO RETURN TO FIELD. CORRECTIVE ACTION: PSEU HAS BEEN REPLACED. (TC# 20191004023)