As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON RETRACTION OF FLAPS ON CLIMB OUT WE RECEIVED THE FLAP LO RATE MESSAGE. ABOUT 20 MINUTES LATER IN CRUISE WE RECEIVED THE FLAP FAIL MESSAGE. ACCOMPLISHED THE CHECKLIST AND PERFORMED FLAP 0 LANDING. EMERGENCY DECLARED. LANDING UNEVENTFUL. REMOVED FROM SERVICE. PERFORMED FAULT ISOLATION PER FIM TASK 27-51-00-810-804-A, DETERMINED FLAP ACE2 FAILED. REPLACED SFACE2 IAW E175 AMM TASK S 27-53-02-000-801-A & 27-53-02-400-801-A; OPERATIONAL CHECKS ARE GOOD. REF WO#274569, N/R-00002FOR INSPECTION FTER OVERSPEED LANDING. AIRCRAFT RETURNED TO SERVICE.