ANC90LA179

NTSB accident investigation · Cessna U206 · Twin Lake, AK · September 3, 1990

Accident · No injuriesLimited investigationFinal report
Date
September 2, 1990, 16:10 local (Sep 3, 1990, 00:10 UTC)
Place
Twin Lake, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N9779MCessna U206
Weather
Visual (VMC) · Day
Status
Completed · report October 2, 1992
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19900902044029A
Case key
5458

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

Inadequate compensation for wind condition.

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 weatherTakeoff - roll/run
Weather condition - gusts
Wind information - unavailablePilot in commandFactor
Loss of control - on ground/waterTakeoff - roll/run
Compensation for wind conditions - inadequatePilot in commandCause
Dragged wing,rotor,pod,float or tail/skidTakeoff - roll/run

Analysis

The air taxi pilot stated that just as the floatplane was getting on the step during the takeoff run, a gust of wind lifted the airplane into the air. The wind then dissipated causing the airplane to stall, roll to the right, and hit the water.

Aircraft

Registration
N9779M
Reported as
Cessna U206
Category
Airplane
Serial number
U20604566
Engine
Continental IO-520, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Positioning · Part 91
Destination
NONE · Nikiski, AK
Flight plan
Company VFR
Airport
NONE

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
36
Certificate
Commercial
Airplane ratings
Single-engine sea, Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Flight hours
5,000 total · 600 in this make and model · 200 in the last 90 days · 100 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 20 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
50 °F, dew point -0 °F

FAA reports on this event · 1

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