FTW98LA217

NTSB accident investigation · Ayres SR2-T34 · Dewitt, AR · May 14, 1998

Accident · No injuriesLimited investigationFinal report
Date
May 14, 1998, 11:00 local (16:00 UTC)
Place
Dewitt, AR
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N393KWAyres SR2-T34
Weather
Visual (VMC) · Day
Status
Completed · report February 15, 2001
Report
Approved by Office Director
FAA report
19980514009659A
Case key
20603

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 proper clearance from a fixed obstacle [utility pole] while maneuvering. A factor was pilot fatigue.

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.

In flight collision with objectManeuvering - aerial application
Clearance - not maintainedPilot in commandCause
Object - utility pole
Fatigue(flight schedule)Pilot in commandFactor

Analysis

While applying chemicals to a field the pilot was maneuvering the agricultural airplane around a power line pole when the left wing tip contacted the base of the pole. The pilot then flew the airplane back to his base of operations. Inspection of the aircraft revealed that the outboard 2 1/2 feet of the left wing was torn off. The pilot had flown over 150 hours in the last 30 days, 12 hours in the last 24 hours, and about 4 hours on the morning of the accident. He stated he was fatigued.

Factual narrative

On May 14, 1998, approximately 1100 central daylight time, an Ayers SR2-T34 agricultural airplane, N393KW, owned and operated by the pilot, was substantially damaged when it impacted a utility pole while applying chemicals to a field near Dewitt, Arkansas. The commercial pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed and no flight plan was filed for the Title 14 CFR Part 137 aerial application flight, which originated from a private grass airstrip about 15 minutes prior to the accident.

In a telephone interview, the pilot reported to the NTSB investigator-in-charge that he was maneuvering around a utility pole when the left wing tip contacted the base of the pole. He then flew the airplane back to his base of operations. Inspection of the aircraft by a FAA inspector revealed that the outboard 2 1/2 feet of the wing was torn off.

The pilot also stated that he had flown over 150 hours in the last 30 days, and 12 hours in the last 24 hours, and about 4 hours on the morning of the accident. He also stated that he was fatigued.

Aircraft

Registration
N393KW
Reported as
Ayres SR2-T34
Category
Airplane
Serial number
T34-212
Airframe hours
1,402
Engine
P&W PT6A-34, 750 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Barry J. Wilson
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · April 16, 1998 · 108 hours before
Departed
NONE

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
31
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Center
Flight hours
6,879 total · 2,990 in this make and model · 400 in the last 90 days · 150 in the last 30 days · 12 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
160° at 7 knots
Visibility
7 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 68 °F
Altimeter
30.00 inHg

FAA reports on this event · 1

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