Event Details

Title:Controlled Flight into Terrain, MarkAir, Inc. Boeing 737-2X6C, N670MA, Unalakleet, Alaska, June 2, 1990
Micro summary:This Boeing 737 crashed 8 miles short of the runway threshold while executing a non-precision approach.
Event Time:1990-06-02 at 0937 ADT
File Name:1990-06-02-US.pdf
Publishing Agency:National Transportation Safety Board (NTSB)
Publishing Country:USA
Report number:NTSB-AAR-91-02
Site of event:7.5 miles short of runway 14, Unalakleet, Alaska
Latitude/Longitude:N6359'45", 16052'55", 530' MSL
Departure:Anchorage International Airport, Anchorage, Alaska, USA
Destination:Unalakleet Airport, Unalakleet, Alaska, USA
Airplane Type(s):Boeing 737-2X6C
Flight Phase:Approach
Type of flight:Ferry
Serious Injuries:4
Other Injuries:0
Executive Summary:On June 2, 1990, at 0937 Alaskan Daylight Time, MarkAir, Inc., flight 3087, a Boeing 737-2X6C, registered in the US as N670MA, crashed about 7.5 miles short of runway 14, Unalakleet, Alaska, while executing a localizer approach to that runway. The flight originated at 0828 at Anchorage International Airport, Anchorage, Alaska. Instrument meteorological conditions existed at the time, and the flight was on an IFR flight plan. The captain, the first officer, and a flight attendant sustained minor injuries. Another flight attendant sustained serious injuries. There were no passengers on board, and the airplane was destroyed. The flight was operated under FAR Part 121.

The National Transportation Safety Board determines that the probable cause of this accident was deficiencies in flightcrew coordination, their failure to adequately prepare for and properly execute the UNK LOC Rwy 14 nonprecision approach and their subsequent premature descent. The safety issues discussed in this report include cockpit resource management and approach chart symbology.

The Safety Board issued a safety recommendation on approach chart standardization to the Federal Aviation Administration. Safety recommendations were also issued to MarkAir, Inc., on the subjects of cockpit resource management and checklist usage.
Learning Keywords:Operations - Airspace - GPWS
Operations - Airspace - Non-Precision Approach
Operations - Charting/Databases
Operations - Crew Resource Management
Operations - Controlled Flight Into Terrain
Other - Post-Crash Survivability
Consequence - Flight Attendant Fatality - Injury
Consequence - Hull Loss


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