A320...Max Ceiling FL390 Vs Max Rec FL398 ?
Hello...
i always wander....why is it showing in the MCDU the max rec is FL398 although why can't climb more than FL390 as is it a limit.
why we have this 800 feet more ?
my personal thinking is ...this 800 feet is to allow for a TCAS RA (Climb) at FL390 ?...may be ?
what do you think ?