FTW99LA137

NTSB accident investigation · Air Tractor AT-502A · Huffman, TX · May 11, 1999

Accident · No injuriesLimited investigationFinal report
Date
May 11, 1999, 13:50 local (18:50 UTC)
Place
Huffman, TX
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N166MMAir Tractor AT-502A
Weather
Visual (VMC) · Day
Status
Completed · report May 8, 2001
Report
Approved by Office Director
FAA report
19990511020549A
Case key
46280

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 compensation for the wind conditions during landing. Factors were the wind gusts and the high vegetation beside the runway.

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.

Loss of control - in flightLanding - flare/touchdown
Weather condition - gustsFactor
Compensation for wind conditions - inadequatePilot in commandCause
On ground/water encounter with terrain/waterLanding - flare/touchdown
Terrain condition - high vegetationFactor
Nose overLanding - roll

Analysis

The pilot of the agricultural airplane was performing his 16th approach of the day into the private airstrip when, during the landing flare, 'a gust of wind picked up [the] left wing and moved [the aircraft] to the right.' The right wing contacted a strip of grass, which was approximately 5 feet tall, along the right side of the runway. The aircraft subsequently 'cartwheeled' to the right and came to rest inverted on the west side of the runway. The pilot reported winds at the time of the accident to be from 130 degrees at 15 knots with gusts to 20 knots.

Factual narrative

On May 11, 1999, at 1350 central daylight time, an Air Tractor AT-502A agricultural airplane, N166MM, was substantially damaged while landing at the South Stoesser Airstrip near Huffman, Texas. The airplane was owned by Southeastern Aircraft Sales of Fort Pierce, Florida, and operated by M and M Air Service of Beaumont, Texas. The commercial pilot, sole occupant of the airplane, was not injured. Visual meteorological conditions prevailed for the Title 14 CFR Part 137 local aerial application flight, and a flight plan was not filed.

According to the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2) submitted by the commercial pilot, it had rained approximately one inch the night prior to the accident. About 0900, the commercial pilot departed the operator's base in Beaumont "to look at airstrip conditions after the rain." He chose South Stoesser Airstrip, a private field, as "it was the dryest to use." After his ground crew relocated to the airstrip, the commercial pilot began fertilizing milo about 1150.

Throughout the day, the commercial pilot performed repeated takeoffs and landings to the south from the 2,600 foot turf runway. After delivering the 16th load of the day, the commercial pilot again returned to South Stoesser Airstrip. During the landing flare, "a gust of wind picked up [the] left wing and moved [the aircraft] to the right." The right wing then contacted a strip of grass, which was approximately 5 feet tall, along the right side of the 150 foot wide runway. The aircraft subsequently "cartwheeled" and came to rest inverted on the west side of the runway.

The 33-year old commercial pilot had accumulated a total of 1,517 flight hours, of which 51 hours were in the 1,174 horsepower turbine powered airplane.

The pilot reported that the winds at the time of the accident were from 130 degrees at 15 knots with gusts to 20 knots. At 1353, the winds at George Bush Intercontinental Airport in Houston, Texas, 19 nautical miles from the accident site, were reported to be from 150 degrees at 16 knots.

According to an FAA inspector, who examined the airplane at the accident site, the fuselage was separated aft of the pilot's seat. The propeller blades, wing tips, landing gear, rudder, ailerons and elevators were also damaged.

Aircraft

Registration
N166MM
Reported as
Air Tractor AT-502A
Category
Airplane
Serial number
502A-0572
Airframe hours
51
Engine
P&W PT6A-45R, 1,174 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
M And M Air Service
Registered owner
Southeastern Aircraft Sales
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · April 21, 1999 · 51 hours before
Departed
NONE
Airport
NONE · South Stoesser Airstrip, runway 18, 2,500 × 150 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
33
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
1,517 total · 51 in this make and model · 1,362 as pilot in command · 100 in the last 90 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
130° at 15 knots, gusting 20
Visibility
10 statute miles
Lowest ceiling
3,000 ft overcast
Temperature
84 °F, dew point 64 °F
Altimeter
29.00 inHg

FAA reports on this event · 1

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