As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLAPS FAILED IN FLIGHT AT 20. BOTH FLAPS INDICATED 20 ON THE SYNOPTIC PAGE, BOTH FLAPS OUTLINED IN YELLOW ON SYNOPTIC PAGE. FLAPS WERE LOWERED AT AIRSPEED OF 180KNOTS. COMPLIED WITH QRH, NO UNUSUAL CONTROL FEEL---[EMERGENCY DECLARED] REMOVED & REPLACED PDU AND RIGGED LT BPSU. OPS CHECK GOOD REMOVED AND REPLACED PDU IAW AMM 27-52-01, OPS CHECK GOOD