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ASN Wikibase Occurrence # 41609
Last updated: 26 August 2019
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Date:18-JAN-1993
Time:08:50
Type:Silhouette image of generic C310 model; specific model in this crash may look slightly different
Cessna 310
Owner/operator:Olson Air Service
Registration: N1776G
C/n / msn: 310R0043
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Teller, AK -   United States of America
Phase: En route
Nature:Unknown
Departure airport:Nome, AK (OME)
Destination airport:
Investigating agency: NTSB
Narrative:
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.' 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.

Sources:

NTSB: http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001211X11639


Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added
21-Dec-2016 19:24 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]

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