As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD INFLIGHT ORD-DCA. CREW REPORTED SPLIT FLAP INDICATION. EMERGENCY DECLARED FLIGHT DIVERTED IAD LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED RT HAND FLAP POSITION TRANSMITTER. SYSTEM GROUND CHECKED NORMAL OPERATION CLOSED.