As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: NUMBER 2 ENGINE FUEL FILTER BYPASS LIGHT ILLUMINATED IN FLIGHT STAYED ON UNTIL ENGINE SHUT DOWN. FOUND FUEL FILTER DIFFERENTIAL PRESSURE SWITCH TO BE CAUSING THE LIGHT TO TURN ON. REMOVED AND REPLACED FUEL FILTER DIFFERENTIAL PRESSURE SWITCH (AALA202408083286), PER AMM 73-34-01. ALSO REPLACED THE FUEL FILTER (AALA202408088277), PER AMM 73-11-02. LEAK CHECK AND OPERATIONAL CHECK OF THE SWITCH GOOD! LIGHT EXTINGUISHED DURING OPERTIONAL CHECK.