What was found
ON THE TAXI INBD TO THE GATE, THE CREW REPORTED THAT THEY HAD HOT BRAKES. WHEN THE ACFT ARRIVED ON THE GATE, AN ATTENDANT NOTICED SMOKE COMING FROM THE RT MAIN OTBD GEAR FOLLOWED BY A SMALL FLAME. ATTENDANT EXTINGUISHED THE FLAME USING THE PCA (AIR CONDITIONING) HOSE. EMERGENCY RESPONSE WAS CONTACTED. ON ARRIVAL AT THE ACFT, MARSHALL SPOKE WITH MX AND DEPARTED WITHOUT FURTHER ACTION. MX IS INSPECTING THE ACFT.