As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GCM INFLIGHT MIA-PTY CREW REPORTED LEFT ENGINE FUEL DIFFERENTIAL PRESSURE WARNING INDICATION ILLUMINATED. EMERGENCY DECLARED FLIGHT DIVERTED GCM LANDED WITHOUT INCIDENT. PLACARD INDICATION PER MEL. REPLACED LEFT ENGINE DIFFERENTIAL PRESSURE SWITCH AND BYPASS FILTER AT MIA ON 05/15/2013. SYSTEM GROUND CHECK NORMAL OPERATION.