If the plane is pressurized, does that even matter?
The cargo bay isn't pressurized as far as I know. People have frozen to death when they hid in there trying to follow a passenger in secret.
My point is solid shell drums
move a lot more than ply shells With those extreme temp changes, the wood will contract or expand depending on the temperature and humidity. It's really dry at minus 65 degrees. Ply drums wont move as much, but better round than cracked or warped. I don't want my brand new drum's heads tensioned when I unbox it.
I'm pretty sure guitars aren't in tune right out of the box and neither should drums IMO.
I can't believe how much my solid shells move with temperature and humidity changes. Well compared to ply drums anyway. Mostly, my drums tune themselves tighter, all by themselves. I have to lower the tunings every so often. It's most noticeable on my bass drums. I start with a low tuned, rock sounding bass drum and it ends up sounding like the Motown bass drum after a few weeks.
Of course if the drum is travelling by truck then the enemy is heat, which doesn't get extreme like the colds of an airplane. Either way, loose heads for initial shipment.