ORIGINAL: jamie_duff
This was indeed a test. The airframe performed a barrel roll uncommanded [X(] and was subsequently relegated to testing in Aberdeen, Maryland.
Here's a link to a side view of the same test.
[link]http://www.chinook-helicopter.com/video/Ground_Resonance_Side_View.mpg[/link]
Exactly....The test that everyone is viewing was set up for a ballistics test and turned into ground resonance because it was chained down too tightly. The aircraft has oleo struts to dampen vibrations, but the chains did not allow these to occur. The breaking you see in the aft rotor is a result of the droop stops not engaging and acutally launches one off!