Factual error: During their court-martial sentencing they are dishonorably discharged and then sent to prison instead of being discharged after prison. They would still be in the military while serving time at a military prison.
Continuity mistake: In the pan around scene Face is shown with the 5th tire being put on him, on the ground scene he only has 4. (00:05:22)
Answer: They can, but only if they have a set of modified rotor blades to be able to do it. The Apache for one is able to do it. The Huey in the movie however is unlikely in reality to be able to do it - there would be no need to fit the modified rotors to what is essentially a transporter.
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