8 Mar 2017: MCDONNELL DOUGLAS MD80 80 — Ameristar and Ameristar Charters

8 Mar 2017: MCDONNELL DOUGLAS MD80 80 (N786TW) — Ameristar and Ameristar Charters

No fatalities • Ypsilanti, MI, United States

Probable cause

the jammed condition of the airplane's right elevator, which resulted from exposure to localized, dynamic wind while the airplane was parked and rendered the airplane unable to rotate during takeoff. Contributing to the accident were (1) the effect of a large structure on the gusting surface wind at the airplane's parked location, which led to turbulent gust loads on the right elevator sufficient to jam it, even though the horizontal surface wind speed was below the certification design limit and maintenance inspection criteria for the airplane, and (2) the lack of a means to enable the flight crew to detect a jammed elevator during preflight checks for the Boeing MD-83 airplane. Contributing to the survivability of the accident was the captain's timely and appropriate decision to reject the takeoff, the check airman's disciplined adherence to standard operating procedures after the captain called for the rejected takeoff, and the dimensionally compliant runway safety area where the overrun occurred.

— NTSB Determination

Accident narrative

The Safety Board's full report is available at http://www.ntsb.gov/investigations/AccidentReports/Pages/aviation.aspx. The Aircraft Accident Report number is NTSB/AAR-19/01.

On March 8, 2017, about 1452 eastern standard time, Ameristar Air Cargo, Inc., dba Ameristar Charters, flight 9363, a Boeing MD-83 airplane, N786TW, overran the departure end of runway 23L at Willow Run Airport, Ypsilanti, Michigan, after the captain executed a rejected takeoff. The 110 passengers and 6 flight crewmembers (two airline transport pilots and four flight attendants) evacuated the airplane via emergency escape slides. One passenger received a minor injury, and the airplane sustained substantial damage. The airplane was operated under the provisions of Title 14 Code of Federal Regulations Part 121 as an on-demand charter flight and was destined for Washington Dulles International Airport, Dulles, Virginia. Visual flight rules conditions prevailed at YIP at the time of the accident.

Contributing factors

Damaged/degraded
Effect on equipment
Effect on equipment
Incorrect service/maintenance
Accuracy of related info

Conditions

Weather: VMC, wind 260/35kt, vis 10sm

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