As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TOP OF DESCENT, LEFT ENGINE VALVE LIGHT ACTIVATED. NO RESPONSE WITH THROTTLE MOVEMENT. RESTARTED LEFT ENGINE. DURING SHORT FINAL APPROACH AGAIN NO RESPONSE FROM LEFT ENGINE. TAXIED TO GATE ON ONE ENGINE. O-RINGS USED TO SEAL THE MINIMUM PRESSURE SHUTOFF VALVE (MPSOV) AGAINST THE FUEL CONTROL HOUSING WERE DAMAGED. FCU WAS REPLACED. OPERATION CHECKS NORMAL.