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Old 4th Mar 2009, 14:18
  #1077 (permalink)  
Dutch Bru
 
Join Date: Aug 2008
Location: Belgium
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translation of 2nd text page of prelim report

"Because of this sudden change, in reality the aircraft has responded as if it were at a height of a few meters above the Polderbaan, by closing the engine power.

It appeared as if the automate – with retarded engines – was in the last stage of flight.

As a result the aircraft lost speed.

In first instance the crew did not respond to this development.

Because of the loss of speed the aircraft arrived at it its minimum flying speed (stall situation) causing warning signals (shaking of the control column at a height of 150 feet).

From the black box it shows that then power was given again immediately. However, for the reinstatement of flight this came too late, the aircraft was too low with the result that the Boeing crash 1 kilometer short of the runway.

From the black box – which can record 25 hours of flight- in this case for this aircraft this consisted of 8 different flights – this particular problem had occurred twice before in a same situation before landing.

The aircraft touched the ground on its tail in first instance and subsequently with its landing gear.
The forward velocity at this impact was around 175 km per hour.
And an airplane at this weight should normally have a landing speed of 260 km per hour.

Because of the agricultural land, which consisted of wet soaked clay, the aircraft was arrested quickly (after about 150 m).

Because of the fall and the braking effect of the ground, the aircraft broke into two parts, the tail section got detached and the aircraft split in the area of the business class section.

The landing gear was sheared off, as is intended by design. This also goes for the two engines.
Because of the full power and the abrupt breaking action both engines were projectiled forward for another 250 meter.

Most of the deadly victims were seated at the split in the business class section and the three crew members in the cockpit deceased as a result of the enormous forces of the breaking action, which also resulted from the stuck nose wheel and the forward pressure of the aircraft.
The parts around the wings have remained in tact mostly.

On board were 127 passengers and 7 crew, of which until now there are still 28 in hospitals.

The investigation of the OVV will from now onwards be fully concentrating on the functioning of the radio altimeters and the coupling towards the automatic throttle system (automatic piloting system)."
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