ANC18LA047

NTSB accident investigation · Dehavilland DHC-2 · Dillingham, AK · June 23, 2018

Accident · Serious injuriesLimited investigationFinal report
Date
June 22, 2018, 17:30 local (Jun 23, 2018, 01:30 UTC)
Place
Dillingham, AK
Injuries
1 serious, 3 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N5221GDehavilland DHC-2
Defining event
Landing: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report June 3, 2020
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA
FAA report
20180623008799A
Case key
97567

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's failure to maintain directional control while landing in gusting wind conditions.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedDehavilland BEAVER DHC-2 MK.1: 2 casesAll aircraft: 3,958 casesProbable cause
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Effect on operationDehavilland BEAVER DHC-2 MK.1: 4 casesAll aircraft: 1,199 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomeDehavilland BEAVER DHC-2 MK.1: 2 casesAll aircraft: 933 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

According to the pilot, he was landing a float-equipped airplane in gusty, tailwind conditions on a remote river. After touching down on the water, the airplane bounced, and a gust of wind turned the tail of the airplane about 45° to the left. The airplane then impacted the riverbank, continued onto the shore, and struck trees, which resulted in substantial damage to the airplane.

Factual narrative

On June 22, 2018, about 1730 Alaska daylight time, a float-equipped de Havilland DHC-2 airplane, N5221G, sustained substantial damage during an impact with trees and terrain, following a loss of directional control during landing, about 53 miles northwest of Dillingham, Alaska. The airplane was registered to and operated by the pilot as a 14 Code of Federal Regulations (CFR) Part 91 visual flight rules personal flight when the accident occurred. The private pilot sustained serious injuries, and the three passengers were uninjured. Visual meteorological conditions prevailed, and no flight plan had been filed. The flight departed Naknek Lake, Alaska (5NK) about 1645. According to the pilot, he was landing with a tailwind on a remote river. After touching down on the water, the airplane bounced, and a gust of wind turned the tail of the airplane about 45° to the left. The airplane then impacted the river bank, continued onto the shore, and struck trees, which resulted in substantial damage to the airplane. The pilot reported no mechanical malfunctions or anomalies that would have precluded normal operation.

Aircraft

Registration
N5221G
Reported as
Dehavilland DHC-2
Category
Airplane
Serial number
667
Built
1954
Engine
Pratt and Whitney R-985, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 31, 2018 · 4 hours before
Departed
5NK · Naknek, AK
Destination
Dillingham, AK
Equipment
Handheld GPS

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
75
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine sea
Medical
Class 3, Waiver time limited special
Last flight review
June 8, 2018
Seat
Left
Restraint
Lap only
Flight hours
3,000 total · 2,000 in this make and model · 3,000 as pilot in command · 5 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 11 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
54 °F, dew point 43 °F
Altimeter
30.07 inHg
Observed at
PADL, 53 nm away

Docket · 2

The files NTSB released with the investigation on January 23, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.5 MB in all.

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 N5221G · 1

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