As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT ENGINE WOULD NOT SHUT DOWN & FUEL FLOW DID NOT DECREASE TO ZERO WHEN FUEL LEVER MOVED TO CUTOFF. STATUS MESSAGE ENGINE FUEL VALVE RT. HAD TO PULL ENGINE FIRE HANDLE TO SHUT DOWN ENGINE. ENGINE DID NOT SHUT DOWN IMMEDIATELY AFTER FIRE HANDLE WAS PULLED. ENGINE CONTINUED TO RUN AN ADDITIONAL 20-30 SECONDS AFTER FIRE HANDLE WAS PULLED.