What was found
ACFT LOST BRAKES. THEY HAD WORKED NORMALLY ON INITIAL TAXI AND HOLD SHORT CROSSING RWY 27. APPROACHING 36C ON TAXIWAY D, GOT NO BRAKING WITH NORMAL. RELEASED BRAKES, WENT TO ALT ON. AGAIN NO BRAKING. WENT TO IDLE REVERSE. RELEASED PEDALS AND TRIED ALT OFF, NO BRAKES. F/O GOT NO BRAKES EITHER. APPLIED PARKING BRAKE AT ABOUT 8-10 KTS AS. ACFT STOPPED AS ADVERTISED. NO HYD LEAKS NOTED. FACT 09MAY13 07:10 CVG U TOWED ACFT FROM RWY. MX CHECKED ACFT FOR HYD LEAKS, NO LEAKS NOTED. ALL HYD QUANTITIES AND PRESSURES NORMAL. OPERATED BRAKE SYS IN NORMAL ON, ALT ON, AND ALT OFF, WHILE VISUALLY CHECKING BRAKE ACTUATION ON ALL 8 BRAKE UNITS AND WHILE MONITORING INDICATED PRESSURES MANY TIMES. AT NO TIME WAS MX ABLE TO DUPLICATE ANY BRAKE MALFUNTION. CHECKED BSCU FOR FAULT CODES. NO FAULT CODES NOTED. PERFORMED BITE AND OPS CHECK OF ANTI-SKID SYS. NO FAULTS NOTED. BRAKE SYS OPS NORMALLY IAW AMM 32-42-00-00, 32-43-00-00, 32-44-00-00, AND 32-45-00-00. ACFT OK FOR CONTINUED SERVICE. FINAL CLOSED.