As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON CLIMB, ON A FLIGHT, THE CABIN STARTED TO FILL WITH SMOKE. THE CREW DECIDED TO RETURN TO BASE FOR A SAFE LANDING ABOUT 20 MINUTES AFTER DEPARTURE. IAW OPERATOR, RT ENGINE FIRE MESSAGE ON EICAS DURING TAKEOFF. ENGINE FIRE WAS NOT CONFIRMED AFTER LANDING ON THE GROUND. NOBODY WAS INJURED.