As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZERO BRAKING ACTION FROM THE RT BRAKE. NO BRAKE PEDAL PRESSURE ON THE NR 3 & 4 BRAKE, SUSPECT BRAKE METERING VALVE. REPLACED AUTOBRAKE SHUTTLE VALVE IAW AMM 32-42-71. NO JOY. REPLACED RT AUTOBRAKE SHUTTLE VALVE PER AMM 32-42-71. NO JOY. REPLACED RT BRAKE METERING VALVE IAW AMM 32-41-31. NO LEAKS NOTED. OPS CHKD GOOD.