As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING BRAKE REPLACEMENT IT WAS NOTICED THAT THE BRAKE BLEEDER VALVE SEAT ON THE NEWLY O/H ASSY WAS CRACKED. IT WAS ALSO NOTICED THAT THE O-RING ON THE FLUID SUPPLY FITTING, ELBOW, WAS ASSEMBLED ON THE THREADED PORTION NOT THE SMOOTH GLAD AREA AND THAT THE O-RING WAS TORN.