INJURED PARTIES WERE DRIVING A.L. LEE PERSONNEL CARRIER DOWN THIE MAIN EAST SLOPE WHEN ONE OF THE BRAKE PADS & PAD BRACKETS BROKE COMPLETELY OFF THE BRAKE ASSEMBLY, CAUSING PLUNGER TO COME OUT LEAKING THE BRAKE FLUID, THEREFORE LOSS OF BRAKES. AFTER THIS, INJURED PUT DIESEL RIDE IN REVERSE, WHICH CAUSED ENGINE TO DIE. AT THIS TIME, INJURED PARTIES HIT ARCHES ON MAIN EAST SLOPE.