What does the word "hot" mean in this context? Is it implying something controversial that might involve the man in trouble?
Kind of! It could definitely mean "controversial". He does mention the term "hot rods" later on. Hot rods are classic cars that have been modified. So in the context of airplanes, "hot" could have the same meaning. If the plane has been modified and is one-of-a-kind, it may need to be monitored to make sure no rules or regulations are broken. Ex: People were bringing their hot rods from all over the country to the fair. Ex: Hey! There's a hot rod over there. Let's go take a picture with it!
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