CEN12CA568

NTSB accident investigation · Air Tractor AT-502B · Bogata, TX · August 17, 2012

Accident · No injuriesData collectionFinal report
Date
August 17, 2012, 16:00 local (21:00 UTC)
Place
Bogata, TX
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N6047GAir Tractor AT-502B
Defining event
Takeoff: Collision during takeoff/land
Weather
Visual (VMC) · Day
Status
Completed · report January 31, 2013
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA Dallas FSDO
FAA report
20120817019089A
Case key
84775

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 inadequate preflight planning, which resulted in the airplane’s loading beyond its maximum gross weight.

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: climb rateAircraft › Aircraft oper/perf/capability · Not attained/maintainedAir Tractor AT-502B: 4 casesAll aircraft: 265 casesProbable cause
Airport facilities/design: runway/landing area lengthEnvironmental issues › Operating environment · Effect on operationAir Tractor AT-502B: 1 caseAll aircraft: 34 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 pilot reported that he completed two successful aerial application flights from the same 2,000-foot turf runway before the accident flight. For the next chemical application, the airplane was loaded on downsloping terrain, in a tail-high attitude, just before the accident flight. This position may have affected the accuracy of the sight gauge. The pilot was distracted during the chemical loading and refueling and did not recheck the level of the chemical in the hopper. In a postaccident interview, the pilot stated that after loading, the airplane exceeded its maximum gross weight by about 500 pounds. The temperature was about 95 degrees Fahrenheit and the wind was from 270 degrees at 5 knots. The pilot departed with 10 degrees of flaps. The airplane became airborne but did not get out of ground effect. According to the pilot, the airplane “sagged” and the left main landing gear hit an embankment. The airplane landed in the adjacent cornfield and sustained substantial damage to the wings and fuselage. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. He stated that a dust devil may have affected the airplane’s performance.

Factual narrative

The pilot reported that he completed two successful aerial application flights from the same 2,000-foot turf runway before the accident flight. The pilot reported that the airplane was not on level terrain when the chemical was added to the load prior to the accident flight, which might have affected the accuracy of the sight gauge. The pilot was distracted during the loading of the chemical and refueling, and he did not recheck the level of the chemical in the hopper. He stated that the airplane's maximum gross weight was overloaded by about 500 pounds. The temperature was about 95 degrees Fahrenheit and the wind was from 270 degrees at 5 knots. He departed from runway 18 with 10 degrees of flaps. The airplane became airborne, but it did not get out of ground effect. He stated that a dust devil might have affected the airplane. According to the pilot, the airplane “sagged” (lost lift) and the left main landing gear hit an embankment. The airplane landed in the adjacent cornfield, and sustained substantial damage to the wings and fuselage. The pilot reported that there was no mechanical malfunction or failure of the airplane prior to the impact with the terrain.

Aircraft

Registration
N6047G
Reported as
Air Tractor AT-502B
Category
Airplane
Serial number
502B-0266
Engine
P&W PT6A SERIES, 500 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Dan Aero Inc
Registered owner
Dan Aero Inc
Airworthiness certificate
Special, Restricted (Special)
Departed
Bogata, TX
Destination
Bogata, TX
Airport
Private Airstrip, runway 18, 2,000 × ft, grass/turf

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
63
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, With waivers/limitations
Flight hours
38,000 total · 27,000 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
290° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
95 °F

Docket · 3

The files NTSB released with the investigation on December 6, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 273 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.