ANC11CA089

NTSB accident investigation · Piper PA-18-150 · Cape Yakataga, AK · August 30, 2011

Accident · No injuriesData collectionFinal report
Date
August 29, 2011, 16:00 local (Aug 30, 2011, 00:00 UTC)
Place
Cape Yakataga, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N82448Piper PA-18-150
Defining event
Initial climb: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report January 18, 2012
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Juneau FSDO
FAA report
20110829019049A
Case key
81637

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 inadvertently switching off the engine magnetos during the initial climb, resulting in a loss of engine power. Contributing to the accident was the manufacturer's placement of the magneto switches.

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.

Use of equip/infoPersonnel issues › Task performance · PilotPiper PA-18-150: 3 casesAll aircraft: 111 casesProbable cause
Ignition system: switchingAircraft › Aircraft power plant · Unintentional use/operationPiper PA-18-150: 2 casesAll aircraft: 9 cases
Physical workspace: positioning/available spaceEnvironmental issues › Task environment · Contributed to outcomePiper PA-18-150: 2 casesAll aircraft: 11 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomePiper PA-18-150: 19 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

The pilot reported that, during the initial climb, he inadvertently switched off the engine magnetos with his coat sleeve while using the trim handle causing the airplane’s engine to shut down; the switches were located on the left side of the cabin. The pilot realized the problem, but, due to the airplane's low altitude, he decided to land instead of trying to restart the engine and climb over obstacles at the end of the airstrip. The airplane touched down in an area of tree stumps and brush, sustaining substantial damage to the wings and fuselage. A postaccident examination of the magneto switches on the accident airplane and other like models revealed that a pilot's coat sleeve can contact and move the guarded magneto switches. The pilot stated that the accident could have been prevented by moving the magneto switches to the instrument panel.

Factual narrative

The pilot reported that during the initial climb, he inadvertently switched off the engine magneto switches on the left side of the cabin with his coat sleeve while using the trim handle, and the airplane's engine shutdown. He realized the problem, but due to the airplane's low altitude, he decided to land instead of trying to restart the engine and climb over obstacles at the end of the airstrip. The airplane touched down in an area of tree stumps and brush, sustaining substantial damage to the wings and fuselage. Examination of the magneto switches on the accident airplane, and other like models, revealed that a pilot's coat sleeve can come in contact with the guarded magneto switches. The pilot stated that the accident could have been prevented by moving the magneto switches to the instrument panel.

Aircraft

Registration
N82448
Reported as
Piper PA-18-150
Category
Airplane
Serial number
18-7909099
Engine
Lycoming O-320 SERIES, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Operator
Fejes Guide Service Ltd
Registered owner
Fejes Guide Service Ltd
Airworthiness certificate
Standard, Normal
Departed
NA · Cape Yakataga, AK
Destination
NA · Cape Yakataga, AK
Airport
NA · Tsiu Lodge Strip

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
56
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
April 26, 2010
Seat
Front
Flight hours
26,785 total · 15,620 in this make and model · 57 in the last 90 days · 35 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 3 knots
Visibility
10 statute miles
Lowest ceiling
2,300 ft broken
Temperature
57 °F, dew point 39 °F
Altimeter
29.98 inHg
Observed at
PACV, 106 nm away

Docket · 1

The files NTSB released with the investigation on December 1, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 719 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 N82448 · 2

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