As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN GEAR EXTENDED FOR LANDING, GOT GEAR DOORS EICAS MESSAGE & GEAR DOORS WARNING LIGHT. RT MLG GEAR DOOR OPEN UPON ARRIVAL EWR. GND CYCLED DOORS USING MAINT PANEL, OPERATIONS OK ON GND. FURTHER TROUBLE SHOOTING REQUIRED. R & R RT MAIN GEAR DOOR ACTUATOR IAW 757 MM 32-32-12-4. OPERATIONS CHECKED GOOD, ACFT OK FOR SERVICE.