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American Airlines 587

Printed page 4. PDF page 18.

from the airplane immediately afterward. At 0915:58.5, the CVR recorded the sound of a loud bang.17 At that time, the airplane was traveling at an airspeed of about 251 knots. 14 These rudder movements are within the authority of the
Open final at PDF page 18In-Flight Separation of Vertical Stabilizer, American Airlines Flight 587

American Airlines 587

Printed page 57. PDF page 71.

during the final seconds of flight 587's recorded FDR data (before the sound of the loud bang at 0915:58.5). Figure 13 shows the calculated bending moment about the root chord in the vertical stabilizer axis system.99 98 Aerodynamic loads on
Open final at PDF page 71In-Flight Separation of Vertical Stabilizer, American Airlines Flight 587

American Airlines 587

Printed page 58. PDF page 72.

the accident flight diverged from those based on the FDR data about the time of the loud bang recorded on the CVR (0915:58.5), indicating that the accident airplane's directional stability was reduced about this time (which is consistent with the
Open final at PDF page 72In-Flight Separation of Vertical Stabilizer, American Airlines Flight 587

American Airlines 587

Printed page 59. PDF page 73.

Factual Information 59 Aircraft Accident Report If the loud bang recorded on the CVR was associated with the fracture of the right rear lug, then the sound would have had to originate at 0915:58.4 because of the time that
Open final at PDF page 73In-Flight Separation of Vertical Stabilizer, American Airlines Flight 587

American Airlines 587

Printed page 133. PDF page 147.

recorder (FDR) recorded a 0.2 G lateral acceleration, which corresponded to the sound of a loud bang recorded by the cockpit voice recorder (CVR) at the same time. The Safety Board's airplane performance study indicated that this change in lateral
Open final at PDF page 147In-Flight Separation of Vertical Stabilizer, American Airlines Flight 587

American Airlines 587

Printed page 195. PDF page 209.

go for power please. 0915:57.7 CAM [sound of loud thump] 0915:58.5 195 CAM [sound of loud bang] 0916:00.0 HOT-2 [sound similar to human grunt] 0916:00.2 CAM [roaring noise starts and increases in amplitude] 0916:01.0 HOT-2 holy #. 0916:01.0 CAM [sound
Open final at PDF page 209In-Flight Separation of Vertical Stabilizer, American Airlines Flight 587