As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 9579 -FCNT/DE- THE CREW NOTED A "PSEU" MESSAGE DISPLAYED ON THE EAD DURING CRUISE. THE QRH WAS COMPLIED WITH, AN EMERGENCY WAS DECLARED WITH ATC, AND THE CREW SAFELY LANDED IN EWR WITH ZERO DEGREE FLAPS AND SLATS. CORRECTIVE ACTION: MAINTENANCE DETERMINED THAT THE PSEU WAS FAULTY AND REPLACED IT. ALL RTS TESTS PERFORMED PASSED AND THE AIRCRAFT HAS RETURNED TO SERVICE. (LP #4289890)