What was found
DURING FLIGHT FROM KPSM TO KACK, THE CREW REPORTED A YELLOW CAUTION MESSAGE, "MAIN BRAKE FAIL." THE CREW DIVERTED BACK TO KPSM AND LANDED WITHOUT INCIDENT. TECHNICIANS DOWNLOADED ACMF AND FHDB FILES TO SEND TO PILATUS FOR ANALYSIS IAW PILATUS AMM PC24-A-E45-45-0000-00A-551A-A AND SERVICED HYDRAULIC FLUID IAW PILATUS AMM-PC24-A-A12-20-0005-00A-212A-A. PILATUS TECHNICAL SUPPORT REQUESTED BRAKE SYSTEM TEST 11 IAW PILATUS AMM-PC24-A-E32-40-0000-00A-340A-A, IF CHECKS GOOD THEN MONITOR AIRCRAFT AFTER RETURN TO SERVICE. TECHNICIANS PERFORMED TEST 11 IAW PILATUS AMM-PC24-A-E32-40-0000-00A-340A-A. NO DEFECTS NOTED.