As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW CALLED IN WITH NR 2 ENG FIRE INDICATION AFTER TAKEOFF AND SHUT DOWN THE ENGINE. RETURNING TO RT1. THERE IS A MX RIDER ON BOARD AND WILL UPDATE WHEN AIRCRAFT IS BACK ON THE GROUND. MX ADVISES THAT THE A/C FAULT WAS A NR 2 ANTI-ICE DUCT LEVEL 3 FAULT.