As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 698 FLL-DCA DIVERTED TO IAD, ON GEAR EXTENSION INTO DCA RECEIVED BRAKE LT AND RT FAULT. AFTER GO AROUND COMPLETED THE QRH PROCEDURE AND MADE A LANDING AT IAD. BRAKE RT FAULT WENT AWAY ON SHORT FINAL, AND THEN RETURNED THEN WENT AWAY AGAIN ON TAXI. THERE WAS A NOTICEABLE GROANING SOUND FROM THE BRAKE ON TAXI IN, THAT WAS NOT PRESENT ON DEPARTURE. REMOVED AND REPLACED I/B SHUT-OFF VALVE IAW AMM 32-41-03. OPS CHECK AND LEAK CHECK OK. ACCOMPLISHED TAXI CHECK. NO ABNORMALITIES NOTED. A/C OK FOR CONTINUED SERVICE.