- Date
- February 13, 1991, 12:39 local (16:39 UTC)
- Place
- Unalaska, AK
- Injuries
- 46 uninjured
- Damage
- Minor damage
- Phase of flight
- Approach
- Aircraft
- N672MABoeing 737-200
- Weather
- Visual (VMC) · Day
- Status
- Completed · report March 9, 1993
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- FAA report
- 19910213008899I
- Case key
- 5494
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
On this page
Probable cause
The windshear encountered on short final. Contributing to the accident was the rising terrain within 150 feet of the runway, the variable nature of the wind due to the rising terrain, and the pilot's failure to maintain lateral control during the go around.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The runway aligns from the southeast to the northwest and within 150 feet east of the runway is a 1,634 foot high mountain. The wind was from the northwest at 14 knots, gusting to 25 knots. The landing threshold for runway 30 was directly downwind of the mountain. During the final approach, the first officer noticed a plus 30 knot deviation in the airspeed and called for the captain to initiate a go around. The captain had already applied power when the airplane began to sink and roll to the right. The right wing tip scraped the runway surface during the go around.
Aircraft
- Registration
- N672MA
- Reported as
- Boeing 737-200
- Category
- Airplane
- Engine
- P&W JT8D, turbo jet
- Damage
- Minor damage
- Flight
- Part 121
- Operator
- Markair, Inc.
- Registered owner
- Markair, Inc.
- Airworthiness certificate
- Standard, Transport
- Last inspection
- Unknown · January 2, 2000
- Departed
- ANC · Anchorage, AK
- Destination
- DUT · Unalaska, AK
- Flight plan
- IFR
- Airport
- DUT · Unalaska, runway 3, 3,800 × 100 ft, asphalt
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 46
- Certificates
- Airline transport, Commercial
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Seat
- Left
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 350° at 15 knots, gusting 26
- Visibility
- 6 statute miles
- Lowest ceiling
- 2,700 ft broken
- Temperature
- 28 °F, dew point 25 °F
- Altimeter
- 29.00 inHg
- Observed at
- DUT, 1 nm away
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.