2002-07-27 / Letters

587 Did A Dutch Roll

587 Did A Dutch Roll

Dear Editor;

I am impressed with your comprehensive coverage of the eyewitness accounts regarding this terrible accident.

However, there is one eyewitness account that has not been mentioned!  This eyewitness says that he observed the aircraft in a steep left bank with the right wing perpendicular to the ground!

This is a transitional attitude of an aircraft during a Dutch roll maneuver! The Dutch roll is initiated by, in this case, an abrupt left yaw motion due to the wind shear forces in the aircraft wake turbulence.

The 200+ mph force striking the vertical fin, BROADSIDE, initiated the abrupt yaw motion, which then presented the right side of the fin to the wind shear of the slipstream, plus the wake turbulence forces.  The instantaneous reversal of these bending forces sheared off the fin just above the connecting lugs!

The instantaneous yaw motion sheared off both engines from the wing supports, not at the designed shear points, but at the pylon connecting structures.  The yaw created a directional acceleration and the right engine landed to the left
of the aircraft's track and the left engine ended up to the right of the
track!  Any time you tear off a mass the size of the engines from the
structure, there will be smoke, fire and a hallacious noise!

Yes the eyewitnesses did see what they saw, but what they saw was not caused by a bomb!

The NTSB will try to cover up and somehow try to pin this on the pilots, or on a spark, as they did in the TWA 800 accident.  This is another story; remember the 'TV' shots of the fin sticking out of the CALM ocean!

The NTSB has made some gross errors in their aircraft accident investigations, such as reading the Flight Data Recorder (FDR) incorrectly, removing essential data from an official report (TWA 800), completely ignoring the ATC Chairman's Factual Report in the United 585 report, disregarding the 'thumps' and the
clicks of the stabilizer trim wheels in the USAir 427 and the EgyptAir 990
accidents!

The 'Industry' is reading the FDR readouts from the Zero G line!

God, save us from the 'experts'!

BILL SHERRIFF

CAPTAIN, AMERICAN AIR LINES, RETIRED

AVIATION SAFEY CONSULTANT


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