ANC89LA008

NTSB accident investigation · de Havilland DHC-3 · Bonanza Hills, AK · October 12, 1988

Accident · No injuriesLimited investigationFinal report
Date
October 11, 1988, 16:00 local (Oct 12, 1988, 00:00 UTC)
Place
Bonanza Hills, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N90574de Havilland DHC-3
Weather
Visual (VMC) · Day
Status
Completed · report August 8, 1989
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19881011046329A
Case key
5139

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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Analysis

The commercial pilot was attempting to land on a private gravel airstrip in rural Alaska. During the landing roll, the left main landing gear encountered snow along the runway edge and veered sharply to the left and off the runway.

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.

Loss of control - on ground/waterLanding - roll
Terrain condition - snow coveredFactor
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandFactor
Clearance - misjudgedPilot in commandCause
Directional control - not maintainedPilot in commandCause
Main gear collapsedLanding - roll

Aircraft

Registration
N90574
Reported as
de Havilland DHC-3
Category
Airplane
Serial number
174
Engine
P&W R-1340, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Lake Clark Air
Registered owner
Lake Clark Air
Airworthiness certificate
Standard, Normal
Departed
NONE · Port Alsworth, AK
Airport
Private Strip

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
41
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea, Multi-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
8,900 total · 1,400 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
0° at 6 knots
Visibility
50 statute miles
Temperature
10 °F

FAA reports on this event · 1

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