According to Owen Crump in his interview for Jack L. Warner: The Last Mogul (2023), this short was produced and in theaters in the span of only eleven days.
James Stewart mentions there are nine crew-members on a Boeing B-17. This was correct for models before the B-17D where a tenth crew-member was added.
Although this film highlights the Boeing B-17 Flying Fortress bomber, James Stewart flew the Consolidated B-24 Liberator bomber in Europe on 20 combat missions - and was the lead pilot on some.