certification.
When the tripple seven was being trialled Greenland wasn`t cold enough. They hopped over to Luleo to catch the cold spell l believe.
Minus 35 as a minimum, with doors etc left open over night.
Demonstrated.
In the same neck of the woods Skyways Sf340`s were grounded if the temp dropped below -35c. ln Kiruna that was the main cause of winter `no goes`.
The envelope starts at -35c and since that is what has been demonstrated then that is the limit. ( mitigated by being towed on arrival inside a warm hangar for the pax to disembark ).
Anyway, cross wind limits are demonstrated also and to think that a ten knot difference between t/o and ldg is in anyway structurally limiting is fanciful.
John, forgive me if l`m wrong but l don`t think so. Pete.