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American Airlines 1420

Printed page 68. PDF page 82.

Fleet Manager stated that the simulator can replicate rudder blanking (that is, the decrease in rudder effectiveness resulting from an increase in reverse power) and that this feature allows the company to train pilots to reduce the amount of reverse
Open official document at PDF page 82Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999

American Airlines 1420

Printed page 137. PDF page 151.

that these operators' flight manuals and training programs contain information on the decrease in rudder effectiveness when reverse thrust power in excess of 1.3 EPR is applied. The Safety Board further believes that the FAA should require all operators of
Open official document at PDF page 151Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999

American Airlines 1420

Printed page 171. PDF page 185.

that these operators' flight manuals and training programs contain information on the decrease in rudder effectiveness when reverse thrust power in excess of 1.3 engine pressure ratio is applied. (A-01-52) Require all operators of MD-80 series airplanes to require a
Open official document at PDF page 185Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999

American Airlines 1420

Printed page 82. PDF page 96.

crab or yaw is present. As reverse thrust increases above 1.3 EPR, rudder effectiveness decreases until it provides no control at about 1.6 EPR. Do not exceed 1.3 EPR reverse thrust on the slippery portions of the runway, except in
Open official document at PDF page 96Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999

American Airlines 1420

Printed page 83. PDF page 97.

above approximately 1.3 EPR, rudder and vertical stabilizer effectiveness continue to decrease until at reverse thrust greater than approximately 1.6 EPR the rudder and vertical stabilizer provide little or no directional control.” The letter emphasized that rudder effec
Open official document at PDF page 97Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999

American Airlines 1420

Printed page 136. PDF page 150.

reverse thrust increases above approximately 1.3 EPR, rudder effectiveness continues to decrease and that, at a reverse thrust greater than approximately 1.6 EPR, the rudder provides little or no directional control. During the time that the accident airplane's reverse thr
Open official document at PDF page 150Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999