ANC00LA069

NTSB accident investigation · de Havilland DHC-2 · Levelock, AK · June 14, 2000

Accident · No injuriesLimited investigationFinal report
Date
June 13, 2000, 17:30 local (Jun 14, 2000, 01:30 UTC)
Place
Levelock, AK
Injuries
7 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N7283de Havilland DHC-2
Weather
Visual (VMC) · Day
Status
Completed · report May 30, 2001
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
20000614042569A
Case key
50967

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's failure to maintain directional control during the takeoff run. A factor associated with the accident was the pilot's diverted attention while retracting the water rudders.

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/waterTakeoff - roll/run
Directional control - not maintainedPilot in commandCause
Diverted attentionPilot in commandFactor
On ground/water encounter with terrain/waterTakeoff - roll/run
Terrain condition - dirt bank/rising embankment

Analysis

The pilot was taking off from a narrow river. He stated that he initially kept the water rudders extended during the downriver takeoff for steerage. He indicated that when the airplane came up on step, it swerved left toward the shallow water, and he did not have time to avoid striking the riverbank. He stated that the swerve was likely caused by a wind gust from the left, or dragging the left float on the shallow river bottom. Five of the six passengers aboard provided written statements to the NTSB. Three of the five reported the wind conditions were calm at the time of the accident. The remaining two passengers did not mention the wind conditions. All five of the passengers noted the airplane veered to the left, towards the riverbank, when the pilot diverted his attention and lowered his head to retract the water rudders.

Factual narrative

On June 13, 2000, about 1730 Alaska daylight time, a DeHavilland DHC-2 float equipped airplane, N7283, sustained substantial damage during takeoff from the American River, about 12 miles east of Levelock, Alaska, at 58 degrees, 56 minutes north latitude, 156 degrees, 36 minutes west longitude. The airline transport pilot, and the six passengers on board, received no injuries. The flight was conducted under 14 CFR Part 91 by Alaska Rainbow Lodge, Inc. Visual meteorological conditions prevailed at the time of the accident, and a company flight plan was filed.

The pilot told the NTSB investigator-in-charge (IIC), during a telephone interview on June 21, that there was a 15 knot gusting wind from about 080 degrees, and he was taking off heading about 140 degrees. He described the river as narrow, and shallow on the left side. He stated that he initially kept the water rudders extended during the downriver takeoff for steerage. The pilot indicated that when the airplane came up on step, it swerved left toward the shallow water, and he did not have time to avoid striking the riverbank. He stated that the swerve was likely caused by a wind gust from the left, or dragging the left float on the shallow river bottom. The airplane sustained substantial damage to the left float attach fittings, and the left wing rear spar.

Five of the six passengers aboard responded to requests by the NTSB IIC to provide written statements about the accident scenario. Three of the five passengers indicated that the wind conditions were calm at the time of the accident. The other two passengers did not note the wind conditions. All five of the respondents indicated that the swerve to the left, toward the bank, occurred as the pilot lowered his head to retract the water rudders.

The pilot was hired by the lodge two weeks prior to the accident. He had accrued about 40 hours in the DHC-2 since being hired, and had been to the landing site one previous time.

Aircraft

Registration
N7283
Reported as
de Havilland DHC-2
Category
Airplane
Serial number
725
Airframe hours
16,642
Engine
P&W R-985, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Registered owner
Alaska Rainbow Lodge
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · February 2, 2000 · 30 hours before
Destination
Kvichak River, AK
Flight plan
Company VFR

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
54
Certificates
Airline transport, Commercial
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
19,000 total · 3,000 in this make and model · 19,000 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
80° at 5 knots, gusting 15
Visibility
15 statute miles
Lowest ceiling
None
Temperature
57 °F
Altimeter
30.00 inHg

FAA reports on this event · 1

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