What was found
(CAN) DURING A ROUTINE TIRE CHANGE FOR WEAR, BRAKE UNIT HAD SPLINTERS OF METAL PROTRUDING FROM FRICTION DISC AREA. WEAR INDICATOR ON BRAKE UNIT INDICATED ONLY ABOUT HALF LIFE ON BRAKES. INSPECTION REVEALED BRAKE UNIT WAS NOT WEARING EVENLY THROUGHOUT ALL ROTORS AND STATORS AND DETERIORATED 1 ROTOR TO HALF OF ITS ORIGINAL THICKNESS. OTHER MAIN WHEEL WAS REMOVED AND SAME PROBLEM REVEALED, REPLACEMENT BRAKE UNIT WAS INSTALLED ON BOTH MAINS AND RELEASED FOR RETURN TO SERVICE.