The U.S. Air Force has embarked on a study to extend the lifespan of its UH-1N helicopters by another thirty years.
This will keep the aircraft flying until their 70s as they entered service in the 1970s.
[thumb]http://www.defensenews.com/article/20120422/DEFREG02/304220002/USAF-Considers-Extending-Huey-30-Years?odyssey=tab|topnews|text|FRONTPAGE[/thumb]