CHI07CA259

NTSB accident investigation · Air Tractor AT-502 · Creston, IA · August 9, 2007

Accident · No injuriesData collectionFinal report
Date
August 9, 2007, 12:25 local (17:25 UTC)
Place
Creston, IA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N9195GAir Tractor AT-502
Weather
Visual (VMC) · Day
Status
Completed · report October 31, 2007
Report
Approved by Office Director
FAA report
20070809017619A
Case key
66608

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 loss of engine power due to fuel starvation as a result of the pilot's inadequate fuel calculations.

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 engine powerCruise
Fuel consumption calculations - inadequatePilot in commandCause
Fluid,fuel - starvationCause
Forced landingEmergency descent/landing
In flight collision with terrain/waterEmergency descent/landing
Terrain condition - crop

Analysis

The engine stopped suddenly when the flight was returning from an aerial application flight. The commercial pilot reported that he had finished spraying a field of soybeans and was ferrying the aircraft back to the airport when the "engine totally quit without any forewarning." He reported that he attempted a forced landing to a nearby highway, but the airplane lost too much altitude before reaching the highway and he executed a forced landing to a soybean field. An on scene inspection found that there was no fuel in the left fuel tank. The header fuel tank located between the left and right fuel tanks was found dry. The header tank's quick fuel drain was found crushed, but held open. About 10 gallons of fuel were found in the right fuel tank. No fuel blight was observed on the bean plants at the accident site. The airplane's owner reported that the airplane was fueled prior to the accident flight, and that the left wing was full of fuel. He reported that the airplane should have had enough fuel for another 20 minutes of flight. He reported that the pilot sprayed the field using a "squeeze pattern." By using the squeeze pattern, the pilot sprayed the outside of the field first and worked his way to the center. By doing so, the airplane was constantly turning in the same direction. The owner reported that you can "sling all the fuel from one side to the other side," and that it's possible to get air in the system.

Factual narrative

The airplane sustained substantial damage during a forced landing to a bean field while en route to the airport after an aerial application flight. The commercial pilot reported that he had finished spraying a field of soybeans and was ferrying the aircraft back to the airport when the "engine totally quit without any forewarning." He reported that he attempted a forced landing to a nearby highway, but the airplane lost too much altitude before reaching the highway and he executed a forced landing to a soybean field. The airplane sustained substantial damage to the right wingtip, the right wing root attachment, and the engine firewall.

The airplane wreckage was recovered from the bean field two weeks after the accident occurred. The airplane was in about a 20-degree, right wing low attitude. No fuel was found in the left fuel tank. The header fuel tank located between the left and right fuel tanks was found dry. The header tank's quick fuel drain was found crushed, but held open. About 10 gallons of fuel were found in the right fuel tank. No fuel blight was observed on the bean plants at the accident site.

The airplane's owner reported that the airplane was fueled prior to the accident flight, and that the left wing was full of fuel. He reported that the airplane should have had enough fuel for another 20 minutes of flight. He reported that the pilot sprayed the field using a "squeeze pattern." By using the squeeze pattern, the pilot sprayed the outside of the field first and worked his way to the center. By doing so, the airplane was constantly turning in the same direction. The owner reported that you can "sling all the fuel from one side to the other side," and that you can get air in the system.

The pilot reported that he had a total of 542 flight hours with 324 hours in make and model. He reported that he had flown 283 hours in the make and model within the last 90 days.

Aircraft

Registration
N9195G
Reported as
Air Tractor AT-502
Category
Airplane
Serial number
502-0234
Engine
Pratt & Whitney PT-6, turbo prop
Damage
Substantial damage
Flight
Ferry · Part 137
Registered owner
Blair Aviation
Airworthiness certificate
Special, Restricted (Special)
Departed
CSQ · Creston, IA

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
28
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2
Flight hours
542 total · 322 in this make and model · 282 in the last 90 days · 96 in the last 30 days

Weather

Conditions
Visual (VMC) · Day

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 N9195G · 1

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