Originally Posted by ckhy
.............. i knew for a fact that the crew experienced controlling problems and eventaully lost control and crashed so it must be linked to the hydrualics
i seriously couldn't think of anything else and the books i have and the internet aren't helping much
........
somewhat of a leap in assumptions above.
When engines are lost under power (nothing wrong with the engine) they do not always tear away cleanly. They have a tendancy to behave like a gyroscope does when you suddenly tilt it (inlet lift on a B747) The end result is that the # 3 engine goes up and to the right and takes out the #4 as well as some critical leading edge surfaces of the wing. Sure with enough speed the aircraft will fly but when you slow it down for approach it comes out of its stable operating envelop, regardles of how well the hydraulic controls and/or electric motors push and pull.