As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. ON INITIAL TAKE OFF ROLL, FLAPS PRIMARY FAIL MESSAGE DISPLAYED ON EICAS. TAKE OFF ABORTED. NO FAULTS LOGGED IN CENTRAL MAINTENANCE COMPUTING FUNCTION. RAN FLAPS TO 5 DEGREES AT GATE WITH NO FAULTS NOTED IAW FIM 27-50-F1. OPERATIONAL CHECK GOOD.