CEN17LA190

NTSB accident investigation · Air Tractor AT 502 · Tahoka, TX · May 4, 2017

Accident · Minor injuriesLimited investigationFinal report
Date
May 4, 2017, 14:00 local (19:00 UTC)
Place
Tahoka, TX
Injuries
1 minor
Damage
Destroyed
Phase of flight
Takeoff
Aircraft
N144HFAir Tractor AT 502
Defining event
Takeoff: Loss of engine power (partial)
Weather
Visual (VMC) · Day
Status
Completed · report April 13, 2020
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20170504004119A
Case key
95200

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 partial loss of engine power during takeoff for reasons that could not be determined based on the available information.

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.

AircraftAircraft › Aircraft power plant · FailureAir Tractor AT-502: 1 caseAll aircraft: 151 cases
Not determinedNot determined › Not determined · Unknown/Not determinedAir Tractor AT-502: 4 casesAll aircraft: 2,247 casesProbable cause

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 commercial pilot of the aerial application flight reported that he had flown several flights in the morning and the airplane was operating normally. Before the final flight of the day, while the airplane was being loaded with product, he heard a noise, but all engine gauges appeared normal. He taxied down the runway and took off. About 30 ft above the ground, the airplane started making more noise and the engine was surging. The pilot attempted to add more power, but the engine did not respond. As the pilot was about to dump the chemical load, the airplane veered to the left and impacted the ground. After the pilot exited the airplane, a postcrash fire ensued. Detailed examination of the engine was not possible due to the severe fire damage.

Factual narrative

On May 4, 2017, about 1400 central daylight time, an Air Tractor AT-502B, N144HF, was destroyed by a post-crash fire following a partial loss of engine power after takeoff from the Bar-T Airport (2F4), near Tahoka, Texas. The commercial pilot sustained minor injuries. The aircraft registered to Wilmington Trust Company, Wilmington, Delaware, and operated by Plains Aerial Applications, Olton, Texas, under the provisions of Title 14 Code of Federal Regulations Part 137 as an aerial application flight. Visual meteorological conditions prevailed in the vicinity and no flight plan was filed. The flight originated from 2F4, Tahoka, Texas, and its intended destination was to a local field to apply chemicals. The pilot reported that he had flown several aerial application flights in the morning and the airplane was operating normally. Prior to the final flight of the day, while the airplane was being loaded with chemicals, he heard a noise, but all engine gauges appeared to indicate that everything was normal. He taxied down runway 35, applied power, and took off. The engine gauges indicated turbine inlet temperature of 8,000° and propeller RPM 2,200. About 30 feet above the ground, the airplane plane started making a noise and the engine was surging. The pilot attempted to add more power, but the engine was not responding, and he tried to keep the airplane flying. Just as the pilot was going to dump the chemical load, the airplane veered to the left and hit the ground. After the pilot exited the airplane, a post-crash fire ensued. A witness at the airport saw the airplane takeoff and fly about 1/2 way down the runway. He stated that the airplane touched down on its left wheel and became airborne again. He saw the airplane past the departure end of the runway and it was losing altitude. He then saw the left wing tilting down and the airplane impacted the ground. Detailed examination of the engine was not possible due to the severe fire damage. No additional information on the accident was available.

Aircraft

Registration
N144HF
Reported as
Air Tractor AT 502 (UNDESIGNAT)
Category
Airplane
Serial number
502-0068
Built
1989
Airframe hours
11,090
Engine
P&W PT6-A-34AG, 650 horsepower, turbo prop
Damage
Destroyed
Fire
On-Ground
Flight
Aerial application · Part 137
Operator
Plains Aerial Applications
Registered owner
Wilmington Trust Co Trustee
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · May 30, 2016 · 300 hours before
Departed
2F4 · Tahoka, TX
Destination
2F4 · Tahoka, TX
Airport
2F4 · T-Bar Airport, runway 35, 3,278 × 50 ft, asphalt
Equipment
Satellite tracking device, Stall warning system

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
57
Injuries
Minor
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Seat
Single
Restraint
4-point
Flight hours
2,000 total · 300 in this make and model · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
20° at 13 knots, gusting 23
Visibility
10 statute miles
Lowest ceiling
None
Temperature
70 °F, dew point 34 °F
Altimeter
30.21 inHg
Observed at
LBB, 35 nm away

Docket · 4

The files NTSB released with the investigation on December 31, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 784 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.