What was found
BRAKES ON RT MLG CAUGHT FIRE DURING LANDING AND CAUSED A 'FLASH FIRE'. FIRE WAS CAUSED BY FLUID LEAKING FROM BRAKE UNIT AND COMING INTO CONTACT WITH HOT BRAKING SURFACE. AN OFF-DUTY PILOT WITNESSED INCIDENT FROM PAX CABIN AND REPORTED FIRE WAS A 'FLASH BALL' THAT EXTINGUISHED ALMOST IMMEDIATELY. A/C’S FWD MOTION AND PROP WASH BLEW SMOKE AND FLAMES AFT. BOTH TIRES BLEW, FIRE DEPART WERE ON SCENE APPROX 3 MINS AFTER INCIDENT AND COOLED GEAR DOWN, INITIALLY WITH A MIST AND THEN WITH A SPRAY AND THEN A FAN WAS USED TO FURTHER REDUCE TEMP. TEMP READING TAKEN APPROX 23 MINS AFTER INCIDENT SHOWED 350 DEGREES F. A TEMP READING TAKEN A FURTHER 10 MINS LATER SHOWED 240 DEGREES F. A VISUAL INSPECTION OF LWR END OF DR