As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MSP - FLT 447 - CAPTAIN REPORTED LT BRAKE PEDAL SOFT AND FO REPORTED HIS LT PEDAL INOP. INSPECTED AND FOUND BRAKE SHUTTLE VALVE STUCK AND LT I/B BRAKE OUT OF ADJUSTMENT. REPLACED LT I/B BRAKE ASSY AND RESET SHUTTLE VALVE AND BLED BRAKE SYSTEM. ACFT RELEASED FOR FLIGHT. (W)