When Hawke was demonstrating Airwolf to Kincaid it had a red nose and was apparently reused footage of Red Wolf or Airwolf II.
When Isela and Kincaid are in the Huey, Isela is in the right seat which is the pilot's seat in Bell helicopters.
When the FIRM was gathering information on Nick Kincaid the description of his UH-1 helicopter stated it had modified engines. The UH-1 depicted has only one engine, it was not a "twin pack" Huey.
The fan seen behind Kincaid in his Huey has the Kenworth truck logo on it.