ANC94LA031

NTSB accident investigation · Cessna 207 · Kwigillingok, AK · February 8, 1994

Accident · No injuriesLimited investigationFinal report
Date
February 8, 1994, 17:00 local (21:00 UTC)
Place
Kwigillingok, AK
Injuries
6 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N6470HCessna 207
Weather
Visual (VMC) · Day
Status
Completed · report January 12, 1995
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19940208003569A
Case key
2484

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot-in-command's failure to maintain the proper airspeed which resulted in an inadvertent stall and his failure to initiate a go-around when the runway environment was not clearly defined. A factor in the accident was the fog.

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.

In flight encounter with weatherApproach - vfr pattern - final approach
Weather condition - fogFactor
Loss of control - in flightApproach - vfr pattern - final approach
Airspeed - not maintainedPilot in commandCause
Stall - inadvertentPilot in commandCause
Go-around - not performedPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The pilot of a scheduled part 135 commuter flight was attempting to land at a fog shrouded airport on a 2500 x 25 ft runway. When the pilot visually acquired the runway, it was 100 feet to his left. The pilot inadvertently stalled the airplane while attempting to align the plane with the runway.

Factual narrative

On February 8, 1994, at approximately 1705 Alaska standard time, a wheel equipped Cessna 207 airplane, N6470H, owned and operated by Yute Air Alaska, collided with runway 33 during a landing attempt at Kwigillingok, Alaska. The airline transport certificated pilot-in-command and the five revenue passengers on board were not injured and the airplane sustained substantial damage. The scheduled commuter flight, conducted under 14 CFR Part 135 and operating as Flight 532, last departed Bethel, Alaska, at 1610 and the destination was Kwigillingok. Visual meteorological conditions prevailed in the general area of the accident site and a company VFR flight plan was in effect.

During a telephone interview on the afternoon of February 10, 1994, the pilot-in-command informed the NTSB investigator-in- charge that there were patches of fog along the approach corridor to the airport and that the runway environment was obscured. The inflight visibility outside the airport traffic pattern area was from two to five miles. The visibility over the approach end of the runway and along the direct approach corridor to the runway was approximately one mile. At an altitude of about 400 feet above the ground and approximately 1 1/2 miles from the runway threshold, he maneuvered the airplane to the right of a fog bank and took up a heading that paralleled the runway. When he visually acquired the runway, it was about 100 feet to his left. By this time, he had selected and gotten full extension of the plane's wing flaps. He then throttle the plane's engine to idle and made a left turn towards the runway using approximately 25 to 30 degrees of bank. He overshot the runway centerline and initiated a right banking turn of about 25 to 30 degrees to align the airplane with the runway. While performing the turn, the airplane stalled and the right wing collided with the runway.

The toxological results on the pilot were negative.

Aircraft

Registration
N6470H
Reported as
Cessna 207
Category
Airplane
Serial number
20700534
Airframe hours
12,245
Engine
Continental IO-520-F, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Registered owner
Yute Air Alaska
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · February 7, 1994 · 4 hours before
Departed
BET · Bethel, AK
Flight plan
Company VFR
Airport
AK85 · Kwigillingok, runway 33, 2,500 × 25 ft, snow

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
24
Certificates
Flight instructor, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
3,621 total · 708 in this make and model · 3,496 as pilot in command · 306 in the last 90 days · 91 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
1 statute miles
Lowest ceiling
800 ft broken
Temperature
30 °F
Observed at
BET, 75 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.

Other investigations on N6470H · 3

Matched to the same aircraft by N-number and date.