As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT WAS STARTING RT ENGINE AND WHEN FUEL CONDITION LEVER WAS ADVANCED, THE LEVER BROKE OFF FLUSH WITH THE PEDESTAL. THE ONLY WAY TO SHUT DOWN ENGINE WAS TO CLOSE FIREWALL SHUT-OFF VALVE. SUBMITTER STATED NEED SET INSPECTION INTERVAL.