As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON LT SIDE (CAPT'S SIDE) NOT BRAKE PRESSURE ON LT PEDAL. LT PEDAL GOES TO THE FLOOR. RT PEDAL WORKS NORMAL. RT SIDE (SIC SIDE) BOTH PEDALS WORK NORMAL. TROUBLESHOOT SYS AND FOUND BRAKE CONTROL VALVE LEAKING AT PLUNGER/ REPLACED BRAKE CONTROL VALVE AND SERVICED BRAKE PEDAL RESERVOIRS. BRAKES OPS CHECK GOOD AT THIS TIME. WORK DONE IAW AMM 32-40-71.