Showing posts with label alaska. Show all posts
Showing posts with label alaska. Show all posts

15 November 2011

Video of July 2010 C-17 Crash in Alaska

The Air Force released a video that showed the flight, prior to the time of impact, of 28 July 2010 crash of a US Air Force C-17A Globemaster III at Joint Base Elmendorf-Richardson near Anchorage, AK.

According to a summary of the Air Force accident investigation, the aircraft was practicing maneuvers for an upcoming air show at the base. After the initial climb out and left turn, the pilot executed an aggressive right turn. As the aircraft banked, the stall warning system activated to alert the crew of an impending stall.

Instead of implementing stall recovery procedures, the pilot continued the turn as planned, and the aircraft entered a stall from which recovery was not possible. Although the pilot eventually attempted to recover the aircraft, he employed incorrect procedures, and there was not sufficient altitude to regain controlled flight. The four crew members; two pilots, a loadmaster, and a safety observer, were all killed, and the $185 million aircraft was destroyed.

The video below starts just before the takeoff of the accident aircraft and ends shortly before impact.



The head of the military accident board found clear and convincing evidence that the cause of the mishap was pilot error. The pilot violated regulatory provisions and multiple flight manual procedures, placing the aircraft outside established flight parameters at an attitude and altitude where recovery was not possible. Furthermore, the copilot and safety observer did not realize the developing dangerous situation and failed to make appropriate inputs. In addition to multiple procedural errors, the head of the board found sufficient evidence that the crew on the flight deck ignored cautions and warnings and failed to respond to various challenge and reply items. The board also found additional crew behavior and organizational factors contributed to the crash.

This was the first fatal crash involving the C-17. In two previous incidents, a C-17 sustained engine damage after being struck by a surface to air missile in Iraq in 2003, and a 2009 gear up landing in Afghanistan.

08 November 2009

Floatplane Crashes at Takeoff - Photographer Ducks Just in Time

The floatplane (a de Havilland DHC-2 Beaver, registration N915RC) was in an otherwise normal takeoff from Lake Hood in Anchorage, Alaska on 7 June 2009 when it encountered a right quartering tailwind gust that lifted up the right wing and float. The airplane veered to the left toward a steep bank, and the pilot was unable to correct the deviation and with the rudder. The airplane lifted off, but the float collided with the top of the bank. The airplane cart wheeled about 160 degrees to the left before coming to rest on its right side. It sustained substantial damage to the wings, fuselage, and floats. The pilot reported that there were no mechanical malfunctions or failures. Reported wind at the airport approximately 3 minutes after the accident was from 020 degrees magnetic at 3 knots, with no recorded gusts.

Fortunately, the pilot and three passengers were not injured. Also fortunate was the fact that the photographer lived to film another day. According to the photographer's description on YouTube, the aircraft passed less than 10 feed from their position.

The NTSB determined that the probable cause of the accident was the pilot's failure to maintain directional control during takeoff.


Crash During Floatplane Takeoff in Anchorage, AK 7 June 2009



Additional Information

NTSB Factual Summary (PDF)
NTSB Full Narritave
NTSB Probable Cause Determination (PDF)