NTSB Identification: ANC99IA027.
The docket is stored in the Docket Management System (DMS). Please contact Records Management Division
Scheduled 14 CFR operation of ALASKA AIR GROUP, INC (D.B.A. ALASKA AIRLINES)
Incident occurred Friday, February 05, 1999 in FAIRBANKS, AK
Probable Cause Approval Date: 07/01/2002
Aircraft: McDonnell Douglas MD-82, registration: N934AS
Injuries: 138 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

The crew of a McDonnell Douglas MD-82 airplane, reported a partial flight control malfunction during takeoff. The captain stated that during the takeoff roll, the airplane's nose failed to rise as he applied aft control yoke pressure. When he applied an excessive amount of aft control yoke pressure, the nose rotated slowly, and the airplane assumed the desired pitch angle for takeoff. Prior to the incident flight, the incident airplane remained parked outside, overnight. During the night the air temperature went below minus 50 degrees F. Following the incident, the airplane underwent an extensive inspection and evaluation of the flight control system, with no flight control anomalies discovered by company maintenance personnel. The NTSB's FDR readout showed that during the initial phase of the incident takeoff roll, both elevators remained in a down position. As the takeoff roll progressed and the airspeed approached 150 knots, both elevators responded to the pilot's control column inputs, and the nose of the airplane rotated. The pilot's control column position was not a recorded parameter of the incident airplaneā€™s FDR.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

The restricted/delayed movement of the elevator flight control due to extremely cold weather conditions.

Full narrative available

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