As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FLT 1620 - TEN MINUTES AFTER DEPARTURE FROM PHL, FLIGHT WARNING COMPUTER INOP MESSAGE APPEARED ON THE MULTI FUNCTION DISPLAY. CREW RECYCLED BREAKERS BUT FAULT MESSAGE REMAINED. FLIGHT RETURNED TO PHL AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE TESTED FLIGHT WARNING SYSTEM. SYSTEM TESTED PROPERLY AND NO FAULT MESSAGES WERE PRESENT. FLIGHT REFUELED AND DEPARTED PHL. (M)