CHI07LA113

NTSB accident investigation · Murphy Aircraft Mfg SR3500 Moose · Cotter, AR · April 22, 2007

Accident · FatalLimited investigationFinal report
Date
April 22, 2007, 14:45 local (19:45 UTC)
Place
Cotter, AR
Injuries
2 fatal
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N360MMMurphy Aircraft Mfg SR3500 Moose
Weather
Visual (VMC) · Day
Status
Completed · report February 28, 2008
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20070422005449A
Case key
65617

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 not maintaining airplane control and airspeed during the approach. Factors were the gusty wind conditions, the inadvertent stall the pilot encountered, and the power lines that were impacted during the uncontrolled descent.

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.

Loss of control - in flightApproach - vfr pattern - final approach
Weather condition - gustsFactor
Aircraft control - not maintainedPilot in commandCause
Airspeed - not maintainedPilot in commandCause
Stall - inadvertentPilot in commandFactor
In flight collision with objectDescent - uncontrolled
Object - wire,transmissionFactor
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground

Analysis

The experimental amateur-built airplane sustained substantial damage on impact with power lines and terrain during approach. A post impact fire occurred. A sheriff's report stated that witnesses observed the airplane on a downwind leg. A witness reported that there were "'dust devils' everywhere. The wind was changing direction every few minutes/seconds, with very strong gusts at times." The airplane made a steep right turn and the witnesses reported that the right wing "dropped." The recorded wind was 180 degrees at 10 knots gusting to 19 knots. An on-scene examination of the wreckage revealed electrical power lines were damaged and the aircraft sustained damage consistent with a post impact fire.

Factual narrative

On April 22, 2007, about 1445 central daylight time, N360MM, registered as an experimental amateur-built Murphy Aircraft Mfg, Ltd., SR3500 Moose airplane, piloted by a private pilot, sustained substantial damage on impact with power lines and terrain during approach to The Valley Airport (61AR), near Cotter, Arkansas. A post impact fire occurred. The personal flight was operating under 14 CFR Part 91. Visual meteorological conditions prevailed at the time of the accident. No flight plan was on file. The pilot and passenger sustained fatal injuries. The flight originated in Clearwater, Florida, and was destined for 61AR.

A Baxter County Sheriff's report stated that witnesses observed the airplane on a downwind leg. A witness reported that there were "'dust devils' everywhere. The wind was changing direction every few minutes/seconds, with very strong gusts at times." The airplane made a steep right turn and the witnesses reported that the right wing "dropped."

At 1435, the recorded weather at the Marion County Regional Airport, near Flippin, Arkansas, was: Wind 180 degrees at 10 knots, gusting to 19 knots; visibility 10 statute miles; sky condition clear; temperature 26 degrees C; dew point 9 degrees C; altimeter 29.95 inches of mercury.

A Federal Aviation Administration Inspector examined the wreckage on-scene. The wreckage came to rest on Denton Ferry Road near County Road 705. Electrical power lines were damaged. The aircraft sustained damage consistent with a post impact fire.

The pilot held a private pilot certificate with airplane single engine land and instrument airplane ratings. He held a third class medical certificate dated July 5, 2005, with limitations for corrective lenses. On the application for that medical certificate, he reported that he had accumulated 3,500 hours of total flight time and 60 hours of flight time in the 6 months prior to the application.

N360MM was an experimental amateur-built Murphy Aircraft Mfg, Ltd., SR3500 Moose airplane, serial number 176SR. It was of an all-metal construction and was an externally braced high wing airplane. It was powered by a nine-cylinder Vedeneyev M14P radial engine, serial number RA9112013.

The Baxter County Coroner's Office arranged the pilot's autopsy, which was performed on April 24, 2007.

The FAA Civil Aerospace Medical Institute prepared a Final Forensic Toxicology Accident Report. The report stated, "QUININE detected in Kidney."

Aircraft

Registration
N360MM
Reported as
Murphy Aircraft Mfg SR3500 Moose
Category
Airplane, amateur-built
Serial number
176SR
Engine
Vedeneyev M14P, reciprocating
Damage
Substantial damage
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
Douglas R. Beechel
Airworthiness certificate
Special, Experimental (Special)
Departed
Clearwater, FL
Destination
61AR · Cotter, AR
Airport
61AR · The Valley Airport

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
66
Injuries
Fatal
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Toxicology
Performed
Flight hours
3,500 total

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 10 knots, gusting 19
Visibility
10 statute miles
Lowest ceiling
None
Temperature
79 °F, dew point 48 °F
Altimeter
29.95 inHg
Observed at
FLP, 4 nm away

Docket · 3

The files NTSB released with the investigation on February 13, 2008, on NTSB’s docket system: statements, records, photos and specialists’ reports. 264 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.