FTW96LA177

NTSB accident investigation · Air Tractor AT-502B · Pond Creek, OK · April 18, 1996

Accident · No injuriesLimited investigationFinal report
Date
April 18, 1996, 17:00 local (22:00 UTC)
Place
Pond Creek, OK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N6050DAir Tractor AT-502B
Weather
Visual (VMC) · Day
Status
Completed · report September 19, 1996
Report
Approved by Office Director
FAA report
19960418007859A
Case key
19811

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 improper planning/decision and failure to obtain/maintain sufficient airspeed to climb after takeoff, which resulted in a stall/mush and subsequent collision with terrain. Factors relating to the accident were: failure of the pilot to follow short field takeoff procedures, and his delay in jettisoning the chemical load.

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 flightTakeoff - initial climb
Planning/decision - improperPilot in commandCause
Short field takeoff/procedure - not followedPilot in commandFactor
Airspeed - not obtained/maintainedPilot in commandCause
Stall/mush - inadvertentPilot in commandCause
Load jettison - delayedPilot in commandFactor
In flight collision with terrain/waterTakeoff

Analysis

According to the pilot, he had routinely flown off the 2,800 foot runway with a similar load; however, on this takeoff, the airplane was not airborne at the usual place. The pilot attempted to dump the chemical load, but he missed the dump handle. After reaching the end of the runway, the airplane became airborne, crossed a ravine where the ground dropped off approximately 30 feet into a creek bed, and impacted terrain on the far side of the creek. The pilot reported that he normally followed the manufacturer's recommended short field takeoff procedure, which called for the use of a 10 degree flap setting; however, he indicated that he might not have used the flaps on the accident flight.

Factual narrative

On April 18, 1996, approximately 1700 central daylight time, an Air Tractor AT-502B, N6050D, was substantially damaged when it collided with terrain during takeoff near Pond Creek, Oklahoma. The airplane was registered to Homestead Leasing Corporation and operated by Homestead Farms Flying Service as a Title 14 CFR Part 137 aerial application flight. Visual meteorological conditions prevailed and a flight plan was not filed. The commercial pilot was not injured. The flight was originating from Homestead Farms Airport at the time of the accident.

During an interview, conducted by an FAA inspector, the pilot reported that he had routinely flown off the 2,800 foot runway with a similar load; however, on this takeoff, the airplane was not airborne at the usual place. He attempted to dump chemical, but missed the dump handle. Upon reaching the end of the runway, the airplane became airborne, crossed a ravine where the ground dropped off approximately 30 feet into a creek bed, and impacted the ground on the far side of the creek. According to the FAA inspector, the airplane sustained substantial damage to both wings, the fuselage, and the empennage.

The pilot did not submit a written statement with his Pilot/Operator Report, NTSB Form 6120.1/2. During a telephone interview, conducted by the investigator-in-charge, the pilot stated that he normally followed the manufacturer's recommended short field takeoff procedure which calls for the use of a 10 degree flap setting. When questioned concerning the use of flaps on the accident flight, the pilot stated that he had been "running longer than usual," was tired, and may not have used flaps.

Aircraft

Registration
N6050D
Reported as
Air Tractor AT-502B
Category
Airplane
Serial number
502B-0254
Airframe hours
726
Engine
P&W PT6A-34A, 750 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Homestead Farms Flying Service
Registered owner
Homestead Leasing Inc.
Airworthiness certificate
Special, Restricted (Special)
Departed
OK72
Airport
OK72 · Homestead Farms, runway 35, 2,800 × 75 ft, asphalt

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
58
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Center
Flight hours
16,129 total · 1,050 in this make and model · 16,000 as pilot in command · 236 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 8 knots
Lowest ceiling
None
Temperature
64 °F

FAA reports on this event · 1

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