ANC09LA102

NTSB accident investigation · Piper PA-12 · Lime Village, AK · September 16, 2009

Accident · No injuriesLimited investigationFinal report
Date
September 15, 2009, 17:00 local (Sep 16, 2009, 01:00 UTC)
Place
Lime Village, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N2594MPiper PA-12
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report October 21, 2010
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration (Airworthiness)
FAA report
20090915049479A
Case key
74761

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

On this page

Probable cause

The passenger's inadvertent interference with, and application of the right brake pedal during 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.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-12: 31 casesAll aircraft: 3,958 casesProbable cause
Personnel issuesPersonnel issues › Miscellaneous · PassengerPiper PA-12: 1 caseAll aircraft: 29 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 commercial pilot and one passenger were taking off from a gravel-covered, remote off-airport site in a tailwheel-equipped airplane on a Title 14, Code of Federal Regulations Part 135 charter flight when the accident occurred. The pilot related that as the airplane accelerated, it began to turn sharply to the right, and towards a stand of trees. The airplane’s right wing struck the stand of trees, which pivoted it to the right where it nosed over, sustaining substantial damage to the wings, fuselage, and empennage. A postaccident inspection revealed that the passenger, seated in the rear of the airplane, inadvertently stepped on the right, rear-mounted dual brake pedal, as the pilot began his takeoff run. The pilot stated that there were no preaccident mechanical problems with the airplane, and that the accident could have been prevented if he had removed or covered the rear-mounted dual brake pedals.

Factual narrative

On September 15, 2009, about 1700 Alaska daylight time, a Piper PA-12 airplane, N2594M, sustained substantial damage when it collided with trees during takeoff from a gravel-covered, remote off-airport site, about 35 miles northeast of Lime Village, Alaska. The airplane was being operated as a visual flight rules (VFR) on-demand charter flight under the provisions of Title 14 Code of Federal Regulations (CFR) Part 135, when the accident occurred. The airplane was owned and operated by Magnuson Airways, LLC, McGrath, Alaska. The commercial pilot and sole passenger were not injured. Visual meteorological conditions prevailed, and company flight following procedures were in effect. The accident flight was shuttling a group of hunters and gear to another off-airport site. During a telephone conversation with the National Transportation Safety Board investigator-in-charge on September 17, the pilot related that before departing from the 900 feet long gravel-covered site, he assessed the wind conditions before departing to the southwest. He determined that a slight westerly wind, ranging between 5 and 10 knots, would require a slight correction for a quartering right crosswind during his takeoff run. The pilot reported that during the takeoff run, as the airplane accelerated, it began to turn sharply to the right, and towards a stand of trees. The airplane’s right wing struck the stand of trees, which pivoted it to the right. The airplane subsequently nosed over, sustaining substantial damage to the wings, fuselage, and empennage. The pilot noted that a postaccident inspection revealed that his passenger, seated in the rear of the airplane, inadvertently stepped on the right, rear-mounted dual brake pedal, as the pilot began his takeoff run. In the pilot’s written statement to the NTSB he indicated that there were no preaccident mechanical problems with the airplane. Additionally, he recommended either removing or covering the rear-mounted dual brake pedals.

Aircraft

Registration
N2594M
Reported as
Piper PA-12
Category
Airplane
Serial number
12-1037
Airframe hours
3,283
Engine
Lycoming O-320, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Operator
Magnuson Airways LLC
Registered owner
Robert L Magnuson
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · September 2, 2009 · 10 hours before
Departed
Lime Village, AK
Destination
Lime Village, AK
Flight plan
Company VFR
Airport
runway 24, 900 × ft, gravel

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
34
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Seat
Front
Flight hours
2,200 total · 2,200 as pilot in command · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F

Docket · 1

The files NTSB released with the investigation on August 6, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 460 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.