Hi Cav-not-ok,
Thanks for correcting me, I can recall now it has to do with the skydrol (or whatever hyd fluid that is) flash point.
While we are on the subject, can you or any of you reading this explain the difference in aerodynamics properties between the 2 winglets?? i.e the one on the 330/340 and the one on the 320/310/300-600?
Regards