FTW99LA196

NTSB accident investigation · Air Tractor AT-502B · Marvel, AR · July 21, 1999

Accident · No injuriesLimited investigationFinal report
Date
July 21, 1999, 12:00 local (17:00 UTC)
Place
Marvel, AR
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N6073UAir Tractor AT-502B
Weather
Visual (VMC) · Day
Status
Completed · report June 22, 2000
Report
Approved by Office Director
FAA report
19990721046319A
Case key
46852

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 failure to attain the proper takeoff airspeed.

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.

In flight collision with terrain/waterTakeoff - initial climb
Terrain condition - crop
Airspeed - not attainedPilot in commandCause
Nose overTakeoff - initial climb

Analysis

During takeoff from a private airstrip, the aerial application airplane skimmed the top of a cotton field. When the pilot took off with a 'heavy load of fertilizer.' The airplane departed to the north on a half paved, half turf runway measuring approximately 3,000 feet long. An examination was conducted of the accident site revealing that a thin-walled plastic pipe carrying water for crops had been hit by the airplane. There was evidence that the airplane continued to 'skim the top of a cotton field for 2,000 feet.' The airplane came to rest inverted in the cotton field.

Factual narrative

On July 21, 1999, at 1200 central daylight time, an Air Tractor AT-502B agricultural airplane, N6073U, was substantially damaged when it impacted terrain during takeoff from a private airstrip near Marvel, Arkansas. The commercial pilot, sole occupant, was not injured. The airplane was owned and operated by Griffin Ag, Inc., of Wabash, Arkansas. 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.

In the enclosed Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2), the pilot stated that while nearing the departure end of the runway during the takeoff, he noticed the airplane "was not wanting to fly." He stated that he "opened the dump handle and started releasing fertilizer from the hopper." He added that at the end of the runway there was a 2-foot incline with cotton planted on top. When he got to the incline, the pilot pulled back on the stick and got the airplane off of the ground, but not over the cotton, which dragged against the wheels.

According to the FAA inspector, who visited the accident site, the pilot took off with a "heavy load of fertilizer." The airplane departed to the north from a half paved, half turf runway measuring approximately 3,000 feet long. The FAA inspector stated that at the departure end of the runway, there was a thin-walled plastic pipe carrying water for crops. Physical evidence indicated that the airplane impacted the pipe and continued to "skim the top of the cotton field for 2,000 feet." The airplane came to rest inverted in the cotton field.

The FAA inspector stated that the fuselage was structurally damaged and twisted to the left just aft of the pilot's station. The right and left wings, empennage and propeller blades sustained damage. The FAA inspector added that the temperature at the time of the accident was approximately 95 degrees Fahrenheit.

Aircraft

Registration
N6073U
Reported as
Air Tractor AT-502B
Category
Airplane
Serial number
AT502B-0355
Airframe hours
2,500
Engine
P&W PT6-34AG, 750 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Griffin Ag, Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · November 20, 1998 · 500 hours before
Departed
NONE
Airport
NONE · Phillips Co. Flying Serv., runway 36, 2,560 × 60 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
23
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Center
Flight hours
1,700 total · 500 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
225° at 2 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
95 °F

FAA reports on this event · 1

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

Other investigations on N6073U · 1

Matched to the same aircraft by N-number and date.