As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LEFT SIDE, RIGHT BRAKE PEDAL INTERMITTENTLY COLLAPSES TO TRAVEL LIMIT WITH LITTLE OR GRABBY BRAKING ACTION. AFTER PUMPING PEDAL NORMAL BRAKE OPS RETURN, THOUGH PEDAL STILL FEELS SOFT AND DOESN’T MATCH LT PEDAL. THE RT SIDE BRAKES OPERATES NORMALLY. MX PERFORMED BLEEDING PROCEDURE ON BOTH BRAKE SYS AND PERFORMED MIXING VALVE FUCTIONAL CHECK.