Wait no more!
http://en.wikipedia.org/wiki/Flash_point
You'll notice I queried your
Kerosine vapour will spontaneously ignite (flash point) at approx 45C.
But we both now know that the 'Auto-ignition temperature' is not the same as the Flash Point
Therefore:-
Kerosine vapour will spontaneously ignite at approx 220°C (428°F)
On the C130, 14th stage (bleed) air can be up to 125psi at 635°F according to Lockheed.