WPR13CA140

NTSB accident investigation · Weston SEA-ERA · Bellevue, WA · March 4, 2013

Accident · Minor injuriesData collectionFinal report
Date
March 4, 2013, 14:00 local (22:00 UTC)
Place
Bellevue, WA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N226SEWeston SEA-ERA
Defining event
Takeoff-rejected takeoff: Dragged wing/rotor/float/other
Weather
Visual (VMC) · Day
Status
Completed · report June 24, 2013
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
FAA SEA-FSDO
FAA report
20130304002279A
Case key
86372

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

The pilot’s failure to maintain control during takeoff on choppy water conditions.

Findings · 3

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotWeston Paul H SEA-ERA: 2 casesAll aircraft: 9,295 casesProbable cause
Runway/land/takeoff/taxi surface: choppy surfaceEnvironmental issues › Physical environment · Effect on operationWeston Paul H SEA-ERA: 1 caseAll aircraft: 20 cases
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedWeston Paul H SEA-ERA: 1 caseAll aircraft: 3,958 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 reported that, during takeoff from a lake, the airplane started to bounce from wave to wave, and it eventually porpoised. When the pilot reduced power to abort the takeoff, the left wingtip ski struck a wave, and the airplane yawed to the left. The right wing then struck the water, and the airplane abruptly stopped. The fuselage and wing spars were substantially damaged. The pilot reported that the wind on the lake at the time of the accident was about 18 knots and that the waves were about 12 to 15 inches high. The pilot reported that the highest waves he had previously encountered in this airplane were 10 to 12 inches high. The pilot reported no preimpact mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Factual narrative

The pilot reported that during takeoff from a lake, the airplane started to bounce from wave to wave and eventually developed into a porpoise. As power was reduced to abort the takeoff, the left wing tip ski struck a wave and the airplane yawed to the left. The right wing then struck the water and the airplane came to an abrupt stop. The fuselage and wing spars were substantially damaged. The pilot reported that the wind on the lake at the time of the accident was about 18 knots and the waves were about 12-15 inches high. The pilot reported that prior to this; the largest waves the airplane has encountered were 10-12 inches high. The pilot reported no mechanical failures or malfunctions with the airplane that would have precluded normal operations.

Aircraft

Registration
N226SE
Reported as
Weston SEA-ERA
Category
Airplane, amateur-built
Serial number
001
Airframe hours
86
Engine
Jabiru 2200, 85 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Weston Paul H
Registered owner
Weston Paul H
Airworthiness certificate
Special, Experimental light sport (Special)
Last inspection
Continuous airworthiness · June 10, 2012 · 21 hours before
Departed
Bellevue, WA
Destination
Bellevue, WA

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
86
Injuries
Minor
Certificate
Sport Pilot
Airplane ratings
Single-engine land, Single-engine sea
Medical
Sport pilot
Last flight review
April 8, 2011
Seat
Single
Flight hours
135 total · 33 in this make and model · 64 as pilot in command · 1 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
55 °F, dew point 27 °F
Altimeter
30.07 inHg
Observed at
RNT, 8 nm away

Docket · 1

The files NTSB released with the investigation on April 19, 2013, on NTSB’s docket system: statements, records, photos and specialists’ reports. 841 KB 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 N226SE · 1

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