As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED. RIGHT FUEL FILTER BYPASS LIGHT CAME ON DURING CRUISE. STAYED ON ENTIRE FLIGHT. ALL ENGINE INDICATIONS WERE NORMAL. LIGHT WENT OUT AFTER ENGINE SHUTDOWN AT GATE. REPLACED FUEL DIFFERENTIAL PRESSURE SWITCH PER 73-34-01. ALSO SEE CONTROL #AALA201712089027.