As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LEFT HAND ENGINE QUIT IN CRUISE FLIGHT WHEN THE ELECTRIC BOOST PUMPS WERE SELECTED OFF AND WOULD NOT RESTART. INVESTIGATION FOUND THE LEFT HAND FIREWALL SHUTOFF VALVE PARTIALLY OFF WITH THE CUT AND JAMMING O-RING STOPPING THE PROPER LEVER SELECTION. THIS CAUSED FUEL STARVATION TO THE ENGINE EVEN WITH THE ENGINE DRIVEN PUMPS FUNCTIONING.