As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 882, LAS-BOS - AFTER TAKEOFF IN LAS, THE CREW RECEIVED "GEAR DOORS AND GEAR DISAGREE" MESSAGE ON EICAS. THE DOOR AND GEAR AMBER LIGHT ON FORWARD PANEL ILLUMINATED. ALL INDICATIONS WERE NORMAL AFTER RECYCLING THE GEAR. MAINTENANCE REPLACED PSEU CARD.