The F-111 fuel dump and burn has cancelled out the SOP not to dump jet fuel if you have a fire.
It became necessary to determine the effects of a fuel dump with the F-111 because the fuel exit nozzle nestles closely in between both engine exhaust nozzles which readily ignite the fuel when engine afterburning. As TAS reduced it was observed that the flame front of the dumping fuel came closer to the dump nozzle but at no time ever caught up with the aircraft. A little of that raw fuel being dumped has to have time to combine with enough air to become burnable.
So over to the Mythbusters to show that you can dump fuel safely airborne in the presence of a fire.