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American Airlines 191

Printed page label not indexed. PDF page 27.

wing's outboard leading edge slats | retracted. In this configuration, the aircraft's stall speed, minimum control speeds: with:the critical engine inoperative (Vis ), and controllability were calculated. The effects that the:loss of the No. 1 MG aulic system and the
Open official document at PDF page 27NTSB AAR-79/17: American Airlines DC-10-10 N110AA, Chicago

American Airlines 191

Printed page label not indexed. PDF page 40.

visual warning device is unacceptable. The warning must begin at a speed exceeding the stall speed or the minimum speed demonstrated"... .by seven percent or atiany lesser margin if the stall warning has enough clarity and duration, distinctiveness, or similar
Open official document at PDF page 40NTSB AAR-79/17: American Airlines DC-10-10 N110AA, Chicago

American Airlines 191

Printed page label not indexed. PDF page 57.

slat retraction at airspeeds above that. .at which the wing. would stall. However, the stall speed for the left wing increased to 159 KIAS.. oo -, | ; ; The. evidence was . conclusive that the aircraft was being flown.
Open official document at PDF page 57NTSB AAR-79/17: American Airlines DC-10-10 N110AA, Chicago

American Airlines 191

Printed page label not indexed. PDF page 58.

regime. However, the stall warning system, which provided a warning based on the 159 KIAS stall speed, was functioning on the successful simulator flights. i Although several pilots were able to recover control of the. aircraft after the roll i
Open official document at PDF page 58NTSB AAR-79/17: American Airlines DC-10-10 N110AA, Chicago

American Airlines 191

Printed page label not indexed. PDF page 62.

stickshaker motor, the system would not have provided a warning based on the slats retracted stall speed schedule, because the computer receiving position information from the left outboard slat was inoperative due to the loss of power on the No.
Open official document at PDF page 62NTSB AAR-79/17: American Airlines DC-10-10 N110AA, Chicago

American Airlines 191

Printed page 68. PDF page 72.

Ht beet for the climbout to *< be flown at V. speed. V, speed was 6 KIAS | below the stall speed for the left ‘wing. Thé deceleration ito” Vo speed caused the aircraft to stall. The start of the
Open official document at PDF page 72NTSB AAR-79/17: American Airlines DC-10-10 N110AA, Chicago