As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: LEFT FUEL FILTER BYPASS LIGHT CAME ON, LIGHT WENT OUT AFTER LEFT ENGINE SHUTDOWN AT THE GATE. REMOVE AND REPLACED LEFT ENG FUEL FILTER AND TIGHTENED BYPASS SWITCH CANNON PLUG. OPERTIONAL AND LEAK CHECKED GOOD. PER MM 73-11-02.