Report: Flight control system problem caused F/A-22 crash
飛行控制系統問題造成F/A-22墜毀

A flight control system problem caused an F/A-22 Raptor to crash on the runway at Nellis Air Force Base, Nev., on Dec. 20 2004, according to an Air Force report.
根據美國空軍說法,2004.12.20一個飛行控制系統的問題造成F/A-22猛禽式戰機在奈里斯基地跑道墜毀.

The pilot ejected and sustained minor injuries. The $133.3-million aircraft, assigned to the 422nd Test and Evaluation Squadron at Nellis, was destroyed when it crashed. Additional damage was limited to an arresting cable, runway guide sign, runway light and the runway itself.
飛行員彈射成功僅受輕傷,價格1.333億美金的飛機在奈里斯基地第422次測試研發飛行,當它墜毀時損毀!額外的損失包括感應線圈,跑道指示燈及跑道本身!

The flight control system malfunction was caused by a brief power interruption to the aircraft’s three rate sensor assemblies, which caused them to fail. The assemblies measure angular acceleration in all three axes: pitch, roll and yaw. With three failed assemblies, the F/A-22 is not able to fly, investigators said.
飛行控制系統不當作用造成飛機三維控制感應介面短暫動力中斷,並使控制作用失效.這個三維感應控制介面有三個方向:前推,翻滾及側滾."隨著三維感應介面失效,F/A-22不能飛行"研發人員表示.

When the pilot shut down engines for maintenance servicing, he left the auxiliary power unit running. Based on technical order guidance, he believed the power unit would supply continuous power to the flight control system. However, there was a less-than-one second power interruption to the assemblies during engine shutdown.
當飛行員關閉引擎維持飛行項目時,他讓向量推力噴嘴單元繼續運作.基於技術指領,他相信動力單元會繼續提供推力給飛行控制系統.然而,當引擎關閉時不到1秒的動力中斷感應介面.

There is no automatic warning of this condition. To discover it, the pilot would have had performed a diagnostic test. The pilot accomplished a successful test before engine shutdown, and because the power unit was on, he believed a second test was unnecessary. (Courtesy of Air Combat Command News Service)
對此情形沒有自動警告,為了發現這個問題,飛行員在引擎關閉前成功完成部分測試,飛行員表示只要動力單元啟動(on),他相信第二次測試飛行就不需要了!