ANC93FA027

NTSB accident investigation · Cessna 310 · Teller, AK · January 18, 1993

Accident · FatalField investigationFinal report
Date
January 18, 1993, 08:50 local (12:50 UTC)
Place
Teller, AK
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N1776GCessna 310
Weather
Visual (VMC) · Night/dark
Status
Completed · report February 28, 1994
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19930118000469A
Case key
5834

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 an adequate terrain avoidance altitude. Factors which contributed to the accident were the dark night and featureless snow covered terrain, both which created a 'featureless terrain illusion' which probably led the pilot to visually overestimate his altitude.

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 collision with terrain/waterDescent - normal
Light condition - dark nightFactor
Terrain condition - snow coveredFactor
Proper altitude - not maintainedPilot in commandCause
Visual/aural detectionPilot in commandFactor

Analysis

The airplane collided with nearly level terrain about 3 mi se of the destination airport. The terrain was snow covered, featureless, unilluminated, and the night sky was very dark. The airport is not served by any navigation aids. Navigation in the area is done by 'pilotage.' Witness reports indicated the visibility of ground reference objects was not possible due to the total darkness and lack of contrast with complete snow covered terrain. The accident occurred prior to the onset of civil twilight. No record of pre-dawn company flights by the pilot during the past 90 days were found. Cessna aircraft company provides a warning 'featureless terrain illusion, an absence of ground features, as when landing over water, darkened areas and terrain made 'featureless by snow' can create the illusion that the airplane is at a higher altitude than it actually is. The pilot who does not recognize this illusion will tend to fly a lower approach.'

Aircraft

Registration
N1776G
Reported as
Cessna 310
Category
Airplane
Serial number
310R0043
Airframe hours
4,914
Engine
Continental IO-520-M, 300 horsepower, reciprocating
Damage
Destroyed
Flight
Part 91
Operator
Olson Air Service, Inc, doing business as Olson Air Service
Registered owner
Olson Air Service, Inc
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · January 11, 1993 · 12 hours before
Departed
OME · Nome, AK
Flight plan
Company VFR

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
37
Certificate
Airline transport
Airplane ratings
Single-engine land, Single-engine sea, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
12,368 total · 1,127 in this make and model · 11,768 as pilot in command · 192 in the last 90 days · 39 in the last 30 days

Weather

Conditions
Visual (VMC) · Night/dark
Lowest ceiling
None
Temperature
-33 °F, dew point -0 °F
Altimeter
29.00 inHg

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.