ERA10CA309

NTSB accident investigation · Air Tractor AT-402B · Alcolu, SC · June 10, 2010

Accident · No injuriesData collectionFinal report
Date
June 10, 2010, 17:25 local (22:25 UTC)
Place
Alcolu, SC
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N5085QAir Tractor AT-402B
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed · report December 20, 2010
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20100610035199A
Case key
76302

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 clearance from a tree. Contributing to the accident was the sunglare.

Findings · 2

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.

Light condition: glareEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeAir Tractor AT-402B: 1 caseAll aircraft: 109 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

According to the pilot, he was conducting an aerial application flight over a field. His vision was obstructed by glare from the sun, and he did not see a dead tree in front of the airplane until “it was too late.” The airplane impacted the tree and descended into the field. The airplane sustained substantial damage to the right wing. The pilot reported that there were no pre-accident mechanical malfunctions or failures with the airplane. He further reported about 14,000 hours of total flight experience, which included 4,700 hours in the same make and model as the accident airplane.

Factual narrative

According to the pilot, he was conducting an aerial application flight over a field. His vision was obstructed by glare from the sun, and he did not see a dead tree in front of the airplane until “it was too late.” The airplane impacted the tree and descended into the field. The airplane sustained substantial damage to the right wing. The pilot reported that there were no pre-accident mechanical malfunctions or failures with the airplane. He further reported about 14,000 hours of total flight experience, which included 4,700 hours in the same make and model as the accident airplane.

Aircraft

Registration
N5085Q
Reported as
Air Tractor AT-402B
Category
Airplane
Serial number
402B-1047
Airframe hours
3,781
Engine
P&W PT6A SERIES, 500 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Williamsburg Air Service Inc
Registered owner
Williamsburg Air Service Inc
Airworthiness certificate
Special, Restricted (Special)
Departed
None · Coker Field, SC
Destination
NONE · Coker Field, SC

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, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Seat
Front
Flight hours
13,995 total · 4,700 in this make and model · 13,500 as pilot in command · 175 in the last 90 days · 100 in the last 30 days · 12 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
91 °F, dew point 70 °F
Altimeter
29.92 inHg
Observed at
KCKI, 19 nm away

Docket · 2

The files NTSB released with the investigation on August 22, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 751 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.