GAA17CA164

NTSB accident investigation · Air Tractor AT 802 · Prentiss, MS · February 28, 2017

Accident · No injuriesData collectionFinal report
Date
February 28, 2017, 13:45 local (19:45 UTC)
Place
Prentiss, MS
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N422BRAir Tractor AT 802
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report June 7, 2017
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20170228011079A
Case key
94798

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 pilot's decision to take off with a gusting tailwind and his subsequent failure to maintain directional control.

Findings · 6

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotAir Tractor AT-802A: 17 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedAir Tractor AT-802A: 10 casesAll aircraft: 3,958 casesProbable cause
Terrain: rough terrainEnvironmental issues › Physical environment · Contributed to outcomeAir Tractor AT-802A: 2 casesAll aircraft: 442 cases
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Response/compensationAir Tractor AT-802A: 2 casesAll aircraft: 594 cases
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Response/compensationAir Tractor AT-802A: 3 casesAll aircraft: 1,199 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 of the tailwheel-equipped airplane reported that, during takeoff in gusting tailwind conditions, as the tailwheel lifted, the airplane drifted to the left and off the runway. He aborted the takeoff and applied "maximum braking" and reverse thrust. During the runway excursion, the airplane impacted a ditch and spun 180°. The pilot added that, as he exited the cockpit, he observed "dark smoke coming from the exhaust and cowling with smoldering burning grass." He reported that he discharged the onboard fire extinguisher into the engine exhaust, main landing gear, and grass. He added that hydraulic fluid leaking from a severed brake line and fuel leaking from the cowl and lower right wing were feeding the postimpact fire. Shortly thereafter, the local volunteer fire department arrived and extinguished the fire. The fuselage and both wings sustained substantial damage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The pilot reported that the wind was from 180º at 15 knots, gusting to 28 knots. The closest automated weather observation station, located about 38 nautical miles from the accident site, recorded wind from 180° at 14 knots, gusting to 22 knots. The airplane took off from runway 30.

Factual narrative

The pilot of a tailwheel-equipped airplane reported that during takeoff in gusting tailwind conditions, as the tailwheel lifted, the airplane drifted to the left and off the runway. He aborted the takeoff and applied "maximum braking" and reverse thrust. During the runway excursion, the airplane impacted a ditch and spun 180°. The pilot added that as he exited the cockpit, he observed "dark smoke coming from the exhaust and cowling with smoldering burning grass." He reported that he discharged the onboard fire extinguisher into engine exhaust, main landing gear, and grass. He added that hydraulic fluid leaking from a severed brake line and fuel leaking from the cowl and lower right wing were feeding the post-impact fire. Shortly thereafter, the local volunteer fire department arrived and extinguished the fire. The fuselage and both wings sustained substantial damage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The pilot reported the wind was 180º at 15 knots with gusts to 28 knots. The closest automated weather observation station, about 38 nautical miles from the accident location, recorded a wind of 180° at 14 knots, gusting to 22 knots. The airplane took off runway 30.

Aircraft

Registration
N422BR
Reported as
Air Tractor AT 802 (A)
Category
Airplane
Serial number
802A-0362
Built
2010
Airframe hours
2,880
Engine
P&W Canada PT6A-67AG, 1,300 horsepower, turbo prop
Damage
Substantial damage
Fire
On-Ground
Flight
Positioning · Part 137
Operator
Airbourn Aviation LLC.
Registered owner
Airbourn Aviation LLC.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · December 31, 2016
Departed
M43 · Prentiss, MS
Destination
LUL · Laurel, MS
Flight plan
VFR
Airport
M43 · Prentiss-Jefferson Davis Count, runway 30, 3,100 × 60 ft, asphalt
Equipment
None

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
36
Injuries
None
Certificates
Commercial, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
February 8, 2017
Seat
Single
Restraint
5-point
Flight hours
12,106 total · 3,000 in this make and model · 11,048 as pilot in command · 24 in the last 90 days · 4 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 14 knots, gusting 22
Visibility
10 statute miles
Temperature
82 °F, dew point 63 °F
Altimeter
30.03 inHg
Observed at
KMCB, 38 nm away

Docket · 3

The files NTSB released with the investigation on May 4, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.3 MB 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.