What was found
FLIGHT 5591 - EN ROUTE JFK-BOS RECEIVED A FLAP CAUTION MESSAGE AT ZERO DEGREES, CREW DECLARED AN EMERGENCY AND FLIGHT LANDED WITHOUT INCIDENT. REPLACED THE LEFT BPSU.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT 5591 - EN ROUTE JFK-BOS RECEIVED A FLAP CAUTION MESSAGE AT ZERO DEGREES, CREW DECLARED AN EMERGENCY AND FLIGHT LANDED WITHOUT INCIDENT. REPLACED THE LEFT BPSU.