As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT DURING PREFLIGHT CHECKS IT WAS DISCOVERED THAT THE LT ENG FIRE SHUTOFF VLV NOT INDICATING CLOSED. THE DEFECTIVE VLV SN 001273 WAS REMOVED FROM SERVICE & AN OVERHAULED UNIT WAS INSTALLED. LEAK & FUNCTIONAL CHECKS WERE SATISFACTORY.