Originally Posted by
ORAC
One of the very first crashes, fire in the engine nacelle. Fire occurred when the nacelle was moving from flight to landing configuration.
There is a 'nacelle drainage' requirement that is intended to help prevent fire when there is a flammable fluid leak in the nacelle. Difficult to meet in a conventional nacelle (especially on an aircraft that has been in service for a while - various bits of debris and FOD tend to block the planned leakage paths) - damn near impossible in something like the Osprey.