10 min.
When pilots in the cockpit do not communicate openly and honestly and freely; you have problems.
In cultures where it is difficult for a subordinate to speak openly to a superior, you will have more plane crashes.
In hierarchical cultures (countries such as Asian nations, Korea being the example used here) this has been the case and they have had to come to terms with it to change this in the airline industry.
http://www.youtube.com/watch?v=hBZcMQILVtc&feature=related