Corrected entry: You don't use a circular saw to cut the metal on a plane's wing. You use a torch. Metal on the wing of a plane is strong enough to damage a circular saw.
LorgSkyegon
4th Mar 2018
Flight of the Phoenix (2004)
Correction: Airplanes are made of aluminium, a softer metal than steel. Add in that since they would be using oil rig-grade equipment, their saws are likely more hardened than standard saw blades and quite possibly have diamond edges. Easily able to cut through the few millimeters thickness of a plane's aluminium skin.
Correction: That must have come as a surprise to the crew who dismantled a Victor bomber - a military aircraft which would be much sturdier than the C119 Flying Boxcar in this film - using a circular saw. See https://www.edp24.co.uk/news/victor-bomber-scrapped-at-raf-marham-7326968?fbclid=IwAR1nwmkJZMNGQyTnOWw-Uc87_jU3292xJ48wJke8f5ilvVPG1GxAc8w3k-I.
And your point is?
I'm not the commenter above, but it's self explanatory. The claim of "you don't use a circular saw to cut a plane's wing" is proven wrong by the recovery experts in that link using a circular saw to cut into a Vulcan bomber's wing.
It hardly needs further elaboration, but since you insist - a Victor (not a Vulcan) bomber was scrapped by being cut to pieces using circular saws. A Victor bomber was built to much higher standards of strength and durability than a civilian cargo aircraft like the C119 in this film. If a Victor bomber can be cut up with a circular saw as was shown in the link, then a C119 could be cut up by an angry boy scout armed with a tin opener.