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Printed page 7. PDF page 21.
Factual Information 7 Aircraft Accident Report According to the FDR, the flight spoilers did not deploy symmetrically at touchdown,21 but a momentary 8° deflection of the left outboard flight spoiler concurrent with a left aileron deflection was recorded.22 5 4Open official document at PDF page 21Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999
Printed page 14. PDF page 28.
the following: “Discrepancy: unable to arm ground spoilers on approach, and spoilers did not deploy manually on landing. Corrective Action: Replace spoiler control actuator andOpen official document at PDF page 28Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999
Printed page 20. PDF page 34.
that there are no aural or visual warnings in the cockpit to indicate that the spoilers did not deploy. However, there are some aural and visual cues to indicate to the flight crew that the spoilers have been deployed, includingOpen official document at PDF page 34Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999
Printed page 21. PDF page 35.
back and latch. In another example, Boeing indicated that the autospoilers on a DC-9 did not deploy on landing but that an inspection revealed that the autospoiler circuit breaker was open. For the remaining events, the data were insufficient toOpen official document at PDF page 35Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999
Printed page 130. PDF page 144.
left outboard flight spoiler concurrent with a left aileron deflection, the spoilers did not deploy upon touchdown. FDR data also showed a momentary full deflection of the right inboard flight spoiler concurrent with a full right aileron roll input duringOpen official document at PDF page 144Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999
Printed page 133. PDF page 147.
after landing and that the captain failed to manually extend the spoilers when they did not deploy. As a result, the wings continued to support most of the airplane's weight, and very little weight was transferred to the landing gear,Open official document at PDF page 147Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999