ANC21LA057

NTSB accident investigation · Dehavilland DHC-2-L-20 · Coffman Cove, AK · July 9, 2021

Accident · No injuriesClass 4 · LimitedFinal report
Date
July 9, 2021, 06:40 local (14:40 UTC)
Place
Coffman Cove, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N9279ZDehavilland DHC-2-L-20
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Alaska Regional Office
FAA report
20210709004279A
Case key
103467

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 impact with a buoy on takeoff which resulted in a nose-over.

Findings · 2

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.

Object/animal/substance: sign/markerEnvironmental issues › Physical environment · Effect on equipmentDehavilland DHC-2-L-20: 1 caseAll aircraft: 214 casesProbable cause

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

The pilot of the float-equipped airplane reported that while accelerating on the water for takeoff, he impacted a green channel buoy and nosed over, which resulted in substantial damage to the left wing, left lift strut and fuselage. The pilot reported that there were no preaccident mechanical malfunctions or anomalies with the airplane that would have precluded normal operation, and that the accident may have been prevented if he had taxied clear of the obstructions before initiating his takeoff.

Aircraft

Registration
N9279Z
Reported as
Dehavilland DHC-2-L-20
Category
Airplane
Serial number
345
Built
1952
Engine
P&W R-985 SERIES, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Positioning · Part 91
Operator
Southeast Aviation
Registered owner
Snow Mountain Enterprises LLC
Airworthiness certificate
Standard, Normal
Destination
Ketchikan, AK
Flight plan
VFR
Airport
KCC · Coffman Cove, runway N/S, 5,000 × 2,000 ft, water
Equipment
ADS-B, Satellite tracking device

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
64
Injuries
None
Certificates
Airline transport, Commercial
Airplane ratings
Single-engine sea, Multi-engine sea, Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
May 12, 2021
Seat
Left
Restraint
3-point
Flight hours
15,526 total · 7,962 in this make and model · 15,386 as pilot in command · 98 in the last 90 days · 48 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
2,000 ft overcast
Temperature
55 °F, dew point 54 °F
Altimeter
30.12 inHg
Observed at
PAKW, 27 nm away
METAR
PAKW 091453Z AUTO 00000KT 10SM OVC020 13/12 A3012 RMK AO2 RAE13 SLP198 P0001 60004 T01280117 53005 TSNO

Docket · 2

The files NTSB released with the investigation on November 12, 2021, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.0 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.