It could be all kinds of things. My airplane has high and low start
restrictions and an absolute temperature limit. The start restrictions are
based on the possibility/probablility of a hot start and the absolute
temperature limit is based on the fuel gelling.

Mike
MU-2


"Happy Dog" wrote in message
. ..
Many GA a/c are restricted to operations above a certain temperature. In
my
case (Zlin 242L) the restriction is -20C at sea level and goes down to -40
C
(or F) at 9000 feet. But, the POH doesn't say why. Anybody know?

moo