I have been looking for “Deadly Encounter” on DVD for over a year. Please let me know if you find a source. There is one copy on Amazon.com at the moment but it is over $500. (It is still there if you want it) I managed to get a copy of “Birds of Prey” about two weeks ago on DVD on ebay for $14.00. I think there are still copies available. The other great helicopter sequence of that era is the last ten minutes of “Capricorn One” with Telly Savalis. Fantastic stuff. Jim Gavin and Davy Jones I seem to recall were the great pilots of the era. Definitely worth a watch if you can find a copy of any of the above.