Event Details

Title:Runway excursion, McDonnell Douglas Corporation, DC-9-80, N1002G, Yuma, Arizona, June 19, 1980
Micro summary:This McDonnell Douglas DC-9-80 skidded off the runway during a simulated hydraulic failure during its test flight program.
Event Time:1980-06-19 at 1849 MST
File Name:1980-06-19-US.pdf
Publishing Agency:National Transportation Safety Board (NTSB)
Publishing Country:USA
Report number:NTSB-AAR-81-16
Site of event:RWY 21R
Departure:Yuma International Airport, Yuma, Arizona, USA
Destination:Yuma International Airport, Yuma, Arizona, USA
Airplane Type(s):McDonnell Douglas DC-9-80 (MD-80)
Flight Phase:Landing
Operator(s):McDonnell Douglas Corporation
Type of flight:Certification Test Flight
Serious Injuries:0
Other Injuries:0
Executive Summary:About 1849 mountain standard time, June 19, 1980, a McDonnell Douglas DC-9-00, N1002G, skidded off the right side of runway 21R while attempting a simulated hydraulic-systems-inoperative landing at the Yuma International Airport, Yuma, Arizona. The aircraft came to rest about 6,700 feet beyond the landing threshold of the runway. Although the aircraft was damaged substantially the three flightcrew members were not injured. There were no passengers. The weather was clear, and the runway was dry.

The aircraft was on an FAA certification test flight to demonstrate compliance with a special condition to 14 CFR Part 25. The purpose of the flight was to show that the aircraft could be controlled adequately and landed safely with a complete failure of its hydraulic systems. The aircraft landed about 1,735 feet beyond the threshold of runway 21R, and the pilot deployed the thrust reversers and applied reverse thrust before the nosewheel touched down. The aircraft began to yaw, continued to yaw after the nosewheel touched down, it then ground looped to the right, and slid off the right side of the runway.

The National Transportation Safety Board determines that the probable cause of this accident was the inadequate procedure established for the certification test flight, and the pilot's mismanagement of thrust following the initial loss of directional control.
Learning Keywords:Operations - Runway Excursion
Systems - Hydraulics
Other - Certification


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