What was found
LEFT ENGINE FUEL FILTER BYPASS LIGHT ILLUMINATED. RETURNED TO DEPARTURE, EMERGENCY DECLARED AND LANDED UNEVENTFULLY. REPLACED THE PRESSURE SWITCH.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LEFT ENGINE FUEL FILTER BYPASS LIGHT ILLUMINATED. RETURNED TO DEPARTURE, EMERGENCY DECLARED AND LANDED UNEVENTFULLY. REPLACED THE PRESSURE SWITCH.