ASN Aircraft accident Boeing 737-2X6C N670MA Unalakleet Airport, AK (UNK)

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Accident description

Last updated: 20 May 2013

Status:	Final
Date:	02 JUN 1990
Time:	09:37 ADT
Type:	Boeing 737-2X6C
Operator:	Markair
Registration:	N670MA
C/n / msn:	23121/1025
First flight:	1984-05-02 (6 years 1 months)
Engines:	2 Pratt & Whitney JT8D-17A
Crew:	Fatalities: 0 / Occupants: 4
Passengers:	Fatalities: 0 / Occupants: 0
Total:	Fatalities: 0 / Occupants: 4
Airplane damage:	Destroyed
Airplane fate:	Written off (damaged beyond repair)
Location:	12 km (7.5 mls) from Unalakleet Airport, AK (UNK) (United States of America)
Phase:	Approach (APR)
Nature:	Ferry/positioning
Departure airport:	Anchorage International Airport, AK (ANC/PANC), United States of America
Destination airport:	Unalakleet Airport, AK (UNK/PAUN), United States of America
Flightnumber:	3087

Narrative:
The Boeing struck the ground during a runway 14 DME approach, 12km short of the runway. The aircraft skidded a few hundred feet, coming to rest with an engine and the tail section separated.

PROBABLE CAUSE: "Deficiencies in flight crew coordination, their failure to adequately prepare for and properly execute the non-precision approach and their subsequent premature descent."

Sources:
» NTSB/AAR-91/02

Official accident investigation report

investigating agency:	National Transport Safety Bureau (NTSB) - USA
report status:	Final
report number:	NTSB/AAR-91-02
report released:	23-JAN-1991
duration of investigation:	235 days (7.8 months)
download report:	Markair, Inc., Boeing 737-2X6C, N670MA Controlled Flight into Terrain, Unalakleet, Alaska June 2, 1990. (NTSB/AAR-91-02)

Follow-up / safety actions

NTSB issued 4 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

Map

This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Anchorage International Airport, AK to Unalakleet Airport, AK as the crow flies is 625 km (391 miles).

languages:

Issued: 13-FEB-1991	To: FAA	A-91-015
IN CONJUNCTION WITH THE FLIGHT INFORMATION ADVISORY COMMITTEE, AND IN COORDINATION WITH JEPPESEN SANDERSON, INC., ARRIVE AT A STANDARD DEPICTION OF REFERENCE CIRCLES OR DISTANCE RINGS ON INSTRUMENT APPROACH CHARTS. THE DEPICTIONS SHOULD INCLUDE COMMON RADII OR THE NOTATION OF THE RADII ON THE APPROACH CHART AND COMMON CENTERING POINTS FOR THE CIRCLES. (Closed - Acceptable Action)
Issued: 13-FEB-1991	To: MARKAIR, INC.	A-91-016
EXPAND THE MARKAIR COCKPIT RESOURCE MANAGEMENT PROGRAM TO CONFORM TO GUIDELINES IN FAA ADVISORY CIRCULAR 120-51. (Closed - Acceptable Action)
Issued: 13-FEB-1991	To: MARKAIR, INC.	A-91-017
REVISE THE MARKAIR GROUND TRAINING PROGRAMS TO ENSURE THAT ALL PILOTS RECEIVE THE CURRENT 16-HOUR MARKAIR COCKPIT RESOURCE MANAGEMENT TRAINING PRIOR TO PARTICIPATING IN SCHEDULED AIR CARRIER OPERATIONS. (Closed - Acceptable Action)
Issued: 13-FEB-1991	To: MARKAIR, INC.	A-91-018
REVISE THE MARKAIR FLIGHT CHECKLISTS AND TRAINING PROGRAM TO ENSURE THAT BLEED SWITCH DEACTIVATION FOR GRAVEL RUNWAY LANDING ACCOMPLISHED AT SUFFICIENT ALTITUDE SO AS NOT TO BE A DISTRACTION DURING CRITICAL PHASES OF FLIGHT. (Closed - Acceptable Action)