MP224

Serial	M.2104
Line Number
First Flight
Model	CH-47D Chinook
Status	Written-off
Comments	(FMS 93-0671); w/o 31.10.2005 while carrying personnel and equipment from Mazar-e-Sharif to Kandahar airfield (with 298 Sqn); During the flight, its captain decided to change the route, shortening the sortie time by 30-45min, but requiring the aircraft to fly along a dead-end valley before rising over a high mountain ridge. However, the required angle of climb exceeded the Chinook's capabilities, forcing the crew to perform a 180-degree turn, in the course of which they lost control of the aircraft. It subsequently crashed, injuring one person. The subsequent investigation said the pilots failed to give enough attention to the flight plan to judge the consequences of the route change, and that assumptions were not properly validated using available data. The pilots also did not act properly on encountering less lift than anticipated, and should have planned an escape route which allowed enough time to turn around. The report says technical factors also contributed to the accident, as a temperature-related limitation degraded engine power and caused the instruments to display the wrong reading for maximum available power, giving the crew the impression that they had sufficient margin to cross the ridge. All valuable parts were stripped from the heavily damaged aircraft before it was destroyed in place on 13.11.2005;
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