ANC90LA162

NTSB accident investigation · De Havilland DHC-2 · Alagnak River, AK · August 31, 1990

Accident · No injuriesLimited investigationFinal report
Date
August 31, 1990, 15:45 local (23:45 UTC)
Place
Alagnak River, AK
Injuries
5 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N24BRDe Havilland DHC-2
Weather
Visual (VMC) · Day
Status
Completed · report September 30, 1992
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19900831038119A
Case key
5443

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

On this page

Probable cause

The pilot-in-command's inadequate preflight planning/preparation, his selection of unsuitable terrain, and his delay in aborting the takeoff.

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.

On ground/water encounter with terrain/waterTakeoff - aborted
Preflight planning/preparation - inadequatePilot in commandCause
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Aborted takeoff - delayedPilot in commandCause

Analysis

The pilot stated that during the takeoff run on the River, he lost directional control of the airplane. The airplane then struck the River bank.

Aircraft

Registration
N24BR
Reported as
De Havilland DHC-2
Category
Airplane
Serial number
644
Airframe hours
9,795
Engine
P&W R-985, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Operator
Hartley, Inc, doing business as Branch River Air Service
Registered owner
Hartley, Inc
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · August 8, 1990 · 99 hours before
Flight plan
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
34
Certificates
Airline transport, Flight instructor
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
2,850 total · 120 in this make and model · 2,500 as pilot in command · 340 in the last 90 days · 150 in the last 30 days · 7 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
240° at 10 knots
Visibility
100 statute miles
Lowest ceiling
None
Temperature
55 °F, dew point 39 °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.

Other investigations on N24BR · 2

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