"Tora, Tora, Tora!" features a number of P-40s and PBYs
getting blowed up good on the ground during the attack.
I assume the P-40s were mockups. Dunno about the PBYs -
it might have been cheaper and easier to use real junked
PBYs from some boneyard somewhere than to build full-sized
mockups.

The P-40s were mock ups. If you look real closely at several that explode you
will see the fiberglass skin come off revealing a steel tube fuselage. Sadly,
the PBYs were genuine and original flying boat variants as well. There are now
probably only three or four flying boat versions left as opposed to the A for
amphibian variant.

John Dupre'