FTW04CA141

NTSB accident investigation · Air Tractor AT-502 · Tarzan, TX · May 26, 2004

Accident · No injuriesData collectionFinal report
Date
May 26, 2004, 11:30 local (16:30 UTC)
Place
Tarzan, TX
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N61407Air Tractor AT-502
Weather
Visual (VMC) · Day
Status
Completed · report September 29, 2004
Report
Approved by Office Director
Parties
FAA Flight Standards District Office
FAA report
20040526007819A
Case key
59321

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 proper airspeed suitable for flight. Contributing factors were the high density altitude and tail wind condition.

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.

On ground/water collision with objectTakeoff - initial climb
Airspeed - not maintainedPilot in commandCause
Weather condition - tailwindFactor
Weather condition - high density altitudeFactor
Terrain condition - berm

Analysis

The airplane began to settle back down on the ground just after take-off from runway N (a 2,650-feet long by 150-feet wide turf runway). The 3,370-hour pilot emptied the load of chemicals, but was still unable to gain altitude. The automated surface observing station at Midland International Airport (MAF), near Midland, Texas, located approximately 12 miles southwest of the airport, reported winds at 170 at 10 knots, gusting to 15 knots, visibility 10 statute miles, sky clear, temperature 88 degrees Fahrenheit, dew point 63 degrees Fahrenheit, and a barometric pressure of 29.88 inches of Mercury. The density altitude was calculated as 5,320 feet based on the outside air temperature of 31 degrees Celsius, a dew point of 17 degrees Celsius, and an altimeter setting of 29.88 inches of mercury. The field elevation at the private airstrip was 2,740 feet msl.

Factual narrative

On May 26, 2004, approximately 1130 central daylight time, an Air Tractor AT-502 single-engine agricultural airplane, N61407, was substantially damaged when it impacted a berm at the departure end of the runway following a loss of control during take-off from Ryan Aerodrome (7TX7), a private field near Tarzan, Texas. The commercial pilot, sole occupant of the airplane, was not injured. The airplane was registered to and operated by the pilot. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 137 aerial application flight. The flight was originating at the time of the accident

According to the Federal Aviation Administration (FAA) inspector, who responded to the accident site, the airplane began to settle back down on the ground just after take-off from runway N (a 2,650-feet long by 150-feet wide turf runway) . The 3,370-hour pilot emptied the load of chemicals, but was still unable to gain altitude. The right wing impacted the ground first, followed by the left main landing gear. The airplane came to rest approximately 180 degrees from the direction of take-off.

Examination of the airplane by the FAA inspector revealed that the left main landing gear and tailwheel separated from the airplane. The outboard section of the right wing was bent up and aft approximately 45 degrees. The left wing-tip was wrinkled and the left aileron was almost completely separated. The rudder and elevator trim tab was completely separated from the airplane. All three propeller blades exhibited S-bending.

The automated surface observing station at Midland International Airport (MAF), near Midland, Texas, located approximately 12 miles southwest of the airport, at 1153, reported winds at 170 at 10 knots, gusting to 15 knots, visibility 10 statute miles, sky clear, temperature 88 degrees Fahrenheit, dew point 63 degrees Fahrenheit, and a barometric pressure of 29.88 inches of Mercury.

The density altitude was calculated as 5,320 feet based on the outside air temperature of 31 degrees Celsius, a dew point of 17 degrees Celsius, and an altimeter setting of 29.88 inches of mercury. The field elevation at the private airstrip was 2,740 feet msl.

Despite repeated attempts by the NTSB investigator in charge (IIC) to acquire a completed Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2) from the pilot, one was not obtained.

Aircraft

Registration
N61407
Reported as
Air Tractor AT-502
Category
Airplane
Serial number
502B-0313
Airframe hours
4,837
Engine
Pratt & Whitney PT6A-34AG, 500 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Cooper Flying Service, doing business as Aerial Application
Registered owner
Roy Cooper
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · December 18, 2003 · 113 hours before
Departed
NONE · Tarzan, TX
Destination
NONE
Airport
NONE · Cooper Flying Service Airstrip

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
49
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Last flight review
April 30, 2003
Seat
Center
Flight hours
3,370 total · 910 in this make and model · 210 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 10 knots, gusting 15
Visibility
10 statute miles
Lowest ceiling
None
Temperature
88 °F, dew point 63 °F
Altimeter
29.87 inHg
Observed at
MAF

FAA reports on this event · 1

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