Attrition: How A Little Bird Brought Down A Gunship

Archives

May 23, 2012: A U.S. Marine Corps accident report was recently released that confirmed a rare case of bird strike bringing down a helicopter. Last September a red-tailed hawk, weighing about 1.4 kg (3 pounds), hit the top of the main rotor mast on a marine AH-1W helicopter gunship. The hawk impact damaged the pitch change link, which caused vibrations that quickly led to the transmission and rotor blades breaking away from the helicopter. The chopper then fell to earth, killing the two man crew. The AH-1 is now going to be modified to better protect the pitch change link, one of several highly vulnerable (to damage) components on a helicopter. Normally, the pitch change link would not be hit by ground fire. No one expected a bird strike up there either.

Aircraft bird strikes are a widespread, if little publicized, problem. There are about 5,000 incidents a year. These often just mean replacing windows or canopies, or wherever the bird hit. Most of the incidents involve near misses or collisions on non-critical portions of the aircraft. But in about one percent of the incidents the damage is severe and some aircraft are lost. On average, 40-50 people a year die because of aircraft bird strikes.

Nearly all the fatal bird strikes are to aircraft with gas turbine engines (which birds fly into). This often wrecks, or severely damages, the engine when the high speed fan is damaged. Multiple engine aircraft usually can survive this if they still have one or more working engines. But sometimes single or two engine aircraft lose all engine power and go down. One exception was the "Miracle On The Hudson" in January 2009, when an Airbus 320 over New York City lost both engines to bird strikes. Exceptional work by the crew managed to bring the aircraft down, intact, on the Hudson River. 

 

 


Article Archive

Attrition: Current 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 


X

ad
0
20

Help Keep Us Soaring

We need your help! Our subscription base has slowly been dwindling. We need your help in reversing that trend. We would like to add 20 new subscribers this month.

Each month we count on your subscriptions or contributions. You can support us in the following ways:

  1. Make sure you spread the word about us. Two ways to do that are to like us on Facebook and follow us on Twitter.
  2. Subscribe to our daily newsletter. We’ll send the news to your email box, and you don’t have to come to the site unless you want to read columns or see photos.
  3. You can contribute to the health of StrategyPage. A contribution is not a donation that you can deduct at tax time, but a form of crowdfunding. We store none of your information when you contribute..
Subscribe   Contribute   Close