As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERTED TO IAD BUT WAS ORIGINALLY GOING TO DCA. CREW REPORTED THE FLAPS FAIL AT 20 DEGREES. A/C IS CURRENTLY OUT OF SERVICE AND MX IS TROUBLESHOOTING. MX FROM CLT WENT TO IAD BUT COULD NOT CLEAR FAULT. A/C FERRIED TO PHL AND BOTH BPSU'S WERE CHANGED OPS CHECKED GOOD