ANC08TA107

NTSB accident investigation · Piper PA-18-150 · Slana, AK · August 19, 2008

Accident · No injuriesFinal report
Date
August 19, 2008, 05:30 local (13:30 UTC)
Place
Slana, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N4151TPiper PA-18-150
Defining event
Takeoff-rejected takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report September 26, 2008
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Anchorage FSDO-03
FAA report
20080819844009A
Case key
68813

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 directional control during an aborted takeoff.

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.

TerrainEnvironmental issues › Physical environment · Not specifiedPiper PA-18-150: 3 casesAll aircraft: 267 cases
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-18-150: 98 casesAll aircraft: 3,958 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Not specifiedPiper 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 commercial pilot was taking off from an unimproved area on a local public use flight under Title 14, CFR Part 91, when the accident occurred. Due to restricted visibility from the cockpit associated with over-sized main landing gear tires, and obstacles on the left side of the takeoff area, the pilot said he was favoring the right side. He reported that during takeoff, the airplane's right wing encountered low willow bushes, pulling the airplane to the right, and that as he aborted the takeoff, the right wing, and then the left wing, struck trees. He said the airplane sustained damage to the left wing and left lift-strut. There were no known mechanical anomalies with the airplane prior to the accident.

Factual narrative

On August 19, 2008, about 0530 Alaska daylight time, a tailwheel equipped Piper PA-18-150 airplane, N4151T, sustained substantial damage when it veered off the takeoff area after encountering brush during the takeoff roll, about 27 miles southeast of Slana, Alaska. The airplane was being operated by the State of Alaska, Alaska State Troopers, Anchorage, Alaska, as a visual flight rules (VFR) public use flight, under Title 14, CFR Part 91, when the accident occurred. The solo commercial certificated pilot was not injured. Visual meteorological conditions prevailed, and company flight following procedures were in effect. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on August 19, a representative of the Alaska State Troopers said the pilot was taking off from an unimproved landing area when the airplane encountered high vegetation, which caused the airplane to veer off the takeoff area. He said the airplane sustained damage to the left wing and left lift-strut. The representative said there were no known mechanical anomalies with the airplane prior to the accident. In a written report to the NTSB dated August 22, the pilot said due to restricted visibility from the cockpit associated with the over-sized main landing gear tires, and obstacles on the left side of the takeoff area, he was favoring the right side. He reported that as the airplane accelerated, its right wing encountered low willow bushes, pulling the airplane to the right. He wrote that as he aborted the takeoff, the right wing, and then the left wing, struck trees.

Aircraft

Registration
N4151T
Reported as
Piper PA-18-150
Category
Airplane
Serial number
1809016
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Public aircraft · Public use
Registered owner
State of Alaska
Airworthiness certificate
Standard, Normal
Departed
Slana, AK
Flight plan
Company VFR

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
42
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
May 1, 2008
Seat
Front
Flight hours
2,309 total · 384 in this make and model · 102 in the last 90 days · 58 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
54 °F

FAA reports on this event · 1

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