MIA98LA061

NTSB accident investigation · Air Tractor AT-602 · Wrightsville, GA · January 29, 1998

Accident · Serious injuriesLimited investigationFinal report
Date
January 29, 1998, 08:00 local (13:00 UTC)
Place
Wrightsville, GA
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N50929Air Tractor AT-602
Weather
Visual (VMC) · Day
Status
Completed · report February 15, 2001
Report
Approved by Office Director
FAA report
19980129000729A
Case key
38446

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 failure of the pilot to maintain airspeed (Vs) resulting in the inadvertent stall during the initial climb.

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
Airspeed(vs) - not maintainedPilot in commandCause
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - open field

Analysis

The pilot stated that after the engine was started, he remained on the ground about 45 minutes with it running while looking over charts, and also to eliminate frost which was on the wings. He also parked the airplane the night before so as to have the sun contact the wings to eliminate the frost. He then maneuvered the airplane onto the runway and when he applied full power, the engine torque was at the upper red line. About 1/2 way down the runway, he noted that the airplane was not accelerating as it had the day before, and with insufficient runway remaining to stop, he continued the takeoff. The airplane lifted off the ground then rolled to the left, impacted the ground, and rolled inverted. The pilot experienced difficulty in exiting the airplane out the left cockpit door and was assisted by ground personnel. His injuries included fractured vertabrae. Post accident examination of the left cockpit door emergency release assembly revealed that the forward hinge was slight dented, no other discrepancies were noted. The engine was removed from the airplane and sent to the manufacturers facility for further examination, which revealed no evidence of preimpact failure or malfunction.

Factual narrative

On January 29, 1998, about 0800 eastern standard time, an Air Tractor AT-602, N50929, registered to Everidge Aerial Farming, Inc., crashed into a field shortly after takeoff from a private airstrip near Wrightsville, Georgia. Visual meteorological conditions prevailed at the time and no flight plan was filed for the 14 CFR Part 137 aerial application flight. The airplane was substantially damaged and the commercial-rated pilot, the sole occupant, sustained serious injuries. The flight was originating at the time of the accident.

The airplane was left outside overnight facing the west so as to have the sun contact the wings in the morning to eliminate the anticipated frost. The pilot stated that he arrived at the airstrip about 0700, performed a preflight of the airplane, and started the engine, then had the fertilizer loaded into the hopper. The engine remained running for about 45 minutes while he reviewed maps, and also to eliminate the moderate frost on the wings. He then cycled the propeller three times and initiated the takeoff run. About 1/2 way down the runway he noticed that the airplane was not accelerating as it had the day before; and at that location, the airplane was too far down the runway to abort. He continued the takeoff and at rotation, the airspeed was slower than he wanted. The airplane then rolled to the left, impacted the ground nose and left wing low, and rolled inverted. The pilot stated that he pulled on the emergency release handle perpendicular to the fuselage to exit out the left cockpit door, but was only able to release the pin from the forward hinge. The pin for the rear hinge did not release. According to the pilot's father, he arrived on scene shortly after the accident and noted that the right cockpit door was open. Using a pair of pliers from outside the airplane, he pulled on the cable of the emergency door release for the left door and was successful in releasing the aft pin. He then bent what was the bottom portion of the left cockpit door down to the ground and pulled the pilot from the airplane. The pilot also stated that he could have exited out the right cockpit door which was open.

Examination of the engine revealed control cable continuity from the cockpit. Additionally, about 1 teaspoon of water was noted in the fuel filter bowl area; the fuel was clear in color. Examination of the airframe revealed that the emergency dump valve handle was in the "open" position and according to a witness who was the pilot's father, he observed chemical dumping just before the impact. The engine was removed from the airplane and shipped to the manufacturers facility in Canada for further examination.

Examination of the engine revealed no evidence of preimpact failure or malfunction. Bench testing of the propeller overspeed governor, fuel pump, fuel control, bleed valve, oil to fuel heater, and propeller governor were accomplished. The results are an attachment to this report.

According to the sheriff's department deputy who talked with a person who identified himself as the pilot's brother, there was frost on the wing tips of the airplane that morning. The deputy also stated that on the morning of the accident, at about 0540, he had frost on the vehicle that was parked at his house, which was located about 1 mile from the crash site.

The airplane minus the retained engine was released to Mr. Les Sychak, of AIG Aviation, on May 8, 1998. The retained engine was also released to Mr. Les Sychak, on October 22, 1998.

Aircraft

Registration
N50929
Reported as
Air Tractor AT-602
Category
Airplane
Serial number
602-0461
Airframe hours
54
Engine
P&W PT6A-60AG, 1,050 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Everidge Aerial Farming, Inc.
Airworthiness certificate
Special, Restricted (Special)

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
30
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
6,098 total · 35 in this make and model · 5,993 as pilot in command · 150 in the last 90 days · 80 in the last 30 days · 10 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 2 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
37 °F, dew point 37 °F
Altimeter
30.00 inHg
Observed at
SBO, 19 nm away

Docket · 9

The files NTSB released with the investigation on January 5, 1999, on NTSB’s docket system: statements, records, photos and specialists’ reports. 5.8 MB 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.