ANC82FA091

NTSB accident investigation · Robertson C-U206F · Near Nondalton, AK · September 17, 1982

Accident · FatalField investigationFinal report
Date
September 17, 1982, 09:30 local (17:30 UTC)
Place
Near Nondalton, AK
Injuries
4 fatal, 1 serious
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N33249Robertson C-U206F
Weather
Visual (VMC) · Day
Status
Completed · report September 17, 1983
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19820917047599A
Case key
71904

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

On this page

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 - in flightTakeoff - initial climb
Weather condition - crosswindFactor
Weather condition - gustsFactor
Weather condition - high windFactor
Weather condition - rainFactor
Weather condition - turbulenceFactor
Weather condition - unfavorable windFactor
Weather condition - windshearFactor
Terrain condition - water,roughFactor
Judgment - poorPilot in commandCause
In flight collision with terrain/waterTakeoff - initial climb
Nose overTakeoff - initial climb
Passenger briefing - not performedPilot in commandFactor
Emergency equipment - not usedPassengerFactor

Analysis

Shortly after takeoff from hudson lake the left wingtip contacted the water causing the acft to cartwheel. The acft came to rest inverted & floated for a short time before sinking. A witness reported the waves on the lake were at least 4 ft high & breaking over the floats, & the wx was the worst he has seen since arriving in late may of 1982. The witness reiterated gale force winds & heavy rain. He also stated the waves in the cove where the takeoff started were opposite to the direction of takeoff & the waves were not a true indication of the wind direction. The waves were almost 90 deg different than the waves in the center of the lake. He said it was difficult to tell when the acft got on step because it was bouncing around badly & the water was hitting the struts. The only person he could see wearing any flotation device was the plt. All the life vests were located under each passenger seat secured in a pouch by metal twists fasteners.

Aircraft

Registration
N33249
Reported as
Robertson C-U206F
Category
Airplane
Serial number
U20602694
Airframe hours
1,428
Engine
Continental IO-520, 300 horsepower, reciprocating
Damage
Destroyed
Flight
Part 135
Operator
Lake Clark Flying Service
Registered owner
Tikchik Lodge
Departed
Near Nondalton, AK
Destination
Z30 · Port Alsworth, AK

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
28
Certificates
Flight instructor, Commercial
Airplane ratings
Multi-engine land, Single-engine land, Multi-engine sea, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Flight hours
2,863 total · 81 in this make and model · 2,567 as pilot in command · 348 in the last 90 days · 104 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
100° at 23 knots
Visibility
25 statute miles
Lowest ceiling
6,000 ft overcast
Temperature
120 °F
Altimeter
29.00 inHg
Observed at
ILI

FAA reports on this event · 1

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