Plane Crash List

Boeing 737-200 N673MA

8 October 1992 · Anchorage, Alaska, United States · No injuries

Summary

On 8 October 1992 at about 17:39 local time, a Boeing 737-200 registered N673MA, operated by Mark Air, Inc, was involved in an incident near Anchorage, Alaska, United States. 26 people were on board and nobody was injured. The NTSB has published a probable cause for this accident; it is quoted in full below.

The record

Date
at 17:39
Classification
Incident
Location
Anchorage, Alaska, United States
Coordinates
69.2194, -146.7896
Aircraft
Boeing 737-200
Registration
N673MA
Category
Airplane
Engines
2
Operator
Mark Air, Inc
Operating rule
Part 121: Air Carrier
Purpose of flight
Unknown
Phase of flight
Not recorded
Route
King Salmon → Elmendorf Afb
Aircraft damage
Not recorded
Weather
VMC
Light
Day
NTSB number
ANC93IA007

People

Nobody was injured.

On board Died Serious Minor Uninjured
26 0 0 0 26

Probable cause

IMPROPER ATC CLEARANCE INSTRUCTIONS BY THE APPROACH CONTROLLER, RESULTING IN A FAILURE TO INSURE SAFE SEPARATION BETWEEN AN AIRPLANE IN VISUAL CONDITIONS WITH AN AIRPLANE IN INSTRUMENT METEOROLOGICAL CONDITIONS ON CONVERGING COURSES. A FACTOR WHICH CONTRIBUTED WAS INSUFFICIENT INFORMATION PROVIDED TO BOTH PILOTS BY THE CONTROLLER.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

THE DHC-8, N680MA, WAS NORTH BOUND IN RADAR CONTROL APRX 8 NM FROM ANC INTL ARPT, AND WAS PROVIDED VISUAL SEPARATION FROM THE B-737, N673MA, NE BOUND ON APCH TO ELMENDORF AFB. THE B-737 WAS IN CLOUDS AT THE TIME OF THE ADVISORY, AND THE DHC-8 MISTOOK ANOTHER B-737 FOR VISUAL SEPARATION. THE TCAS ALERTED THE FIRST B-737 PILOT OF CLOSE PROXIMITY OF TRAFFIC APPROACHING AT AT HIS 2 O'CLOCK POSITION, AND HE INITIATED A CLIMB IN IMC. A RAPID DESCENT WAS INITIATED BY THE DHC-8 PILOT AFTER SEEING THE B-737 EMERGING FROM THE CLOUDS. THESE EVASIVE ACTIONS OCCURRED APPROXIMATELY 20 SECS PRIOR TO THE CROSSING OF THE TRACKS OF THE TWO AIRPLANES. ATC CONTROL OF THE CONFLICTING AIRPLANES WAS BY THE SAME POSITION CONTROLLER ON SEPARATE FREQUENCIES. THE B-737 PILOT WAS NOT ADVISED NOR AWARE OF THE DHC-8 BEING PROVIDING VISUAL SEPARATION FROM HIS AIRPLANE PER FAA ORDER 7110.65G UNTIL THE TCAS PULL-UP AND VISUAL SIGHTING OF THE TRAFFIC PASSING UNDER AND IN FRONT.

Quoted verbatim from the NTSB record.

Aircraft involved

Aircraft Registration Operator Damage
Boeing 737-200 737-200 N673MA Mark Air, Inc -
De Havilland DHC-8 DHC-8 N680MA Mark Air Inc. -

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no coordinates
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All 1,317 records for this type

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All 170,864 records in United States