CHI07CA227

NTSB accident investigation · Air Tractor AT-602 · Prophetstown, IL · July 23, 2007

Accident · No injuriesData collectionFinal report
Date
July 23, 2007, 18:30 local (23:30 UTC)
Place
Prophetstown, IL
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N628JPAir Tractor AT-602
Weather
Visual (VMC) · Day
Status
Completed · report December 20, 2007
Report
Approved by Office Director
Parties
FAA-DuPage FSDO
FAA report
20070723022519A
Case key
67133

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 accurately monitor fuel consumption during flight, which resulted in a loss of engine power due to fuel starvation/exhaustion. A contributing factor was the cornfield encountered during the forced landing.

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
Fluid - starvation/exhaustionCause
Planning/decision - inadequatePilot in commandCause
Forced landingEmergency descent/landing
In flight collision with terrain/waterEmergency landing
Terrain condition - cropFactor
Terrain condition - ground
Nose overEmergency landing

Analysis

The airplane was substantially damaged during a forced landing following a loss of engine power. The pilot stated that about 6 miles from the intended destination, the engine started to lose power and he was no longer able to maintain altitude. He setup for a forced landing on a road. He reported that during the approach he maneuvered to avoid a ditch adjacent to the road. The "controls got sloppy and the airplane subsequently stalled about 15 [feet] from the road." The right wing "dipped" and impacted a cornfield, causing the airplane to nose over. The pilot's statement noted he had departed with full fuel (216 gallons) and the flight's duration was approximately 2-1/2 hours. He expected to burn 68 - 70 gallons per hour (gph) at 162 knots. He stated that at the time of the loss of engine power, the fuel gauges indicated that one-quarter remained in the left fuel tank and one-eighth remained in the right fuel tank. He reported that after the engine initially lost power it would regain partial power for short periods of time. He added that he did not suspect an engine problem and believed the loss of engine power was due to fuel starvation. The airplane manufacturer stated that total fuel capacity for the accident airplane make and model was 216 gallons, and that the maximum useable fuel was 210 gallons. At normal cruise, the expected fuel consumption would be approximately 70 to 75 gph, at 155 knots. At high cruise, fuel consumption would be expected to be approximately 83 - 84 gph.

Factual narrative

The airplane was substantially damaged during a forced landing following a loss of engine power. The pilot stated that about 6 miles from the intended destination, the engine started to lose power and he was no longer able to maintain altitude. He setup for a forced landing on a road. He reported that during the approach he maneuvered to avoid a ditch adjacent to the road. The "controls got sloppy and the airplane subsequently stalled about 15 [feet] from the road." The right wing "dipped" and impacted a cornfield, causing the airplane to nose over. The pilot's statement noted he had departed with full fuel (216 gallons) and the flight's duration was approximately 2-1/2 hours. He expected to burn 68 - 70 gallons per hour (gph) at 162 knots. He stated that at the time of the loss of engine power, the fuel gauges indicated that one-quarter remained in the left fuel tank and one-eighth remained in the right fuel tank. He reported that after the engine initially lost power it would regain partial power for short periods of time. He added that he did not suspect an engine problem and believed the loss of engine power was due to fuel starvation. The airplane manufacturer stated that total fuel capacity for the accident airplane make and model was 216 gallons, and that the maximum useable fuel was 210 gallons. At normal cruise, the expected fuel consumption would be approximately 70 to 75 gph, at 155 knots. At high cruise, fuel consumption would be expected to be approximately 83 - 84 gph.

Aircraft

Registration
N628JP
Reported as
Air Tractor AT-602
Category
Airplane
Serial number
602-0564
Airframe hours
3,358
Engine
Pratt & Whitney PT6A-60AG, 1,150 horsepower, turbo prop
Damage
Substantial damage
Flight
Positioning · Part 91
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · March 1, 2007
Departed
PVT · Newport, AR
Destination
PVT · Flinton, IL

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
46
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Without waivers/limitations
Last flight review
April 1, 2006
Seat
Single
Flight hours
3,729 total · 0 in this make and model · 3,301 as pilot in command · 115 in the last 90 days · 54 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
79 °F, dew point 61 °F
Altimeter
30.05 inHg
Observed at
SQI

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 N628JP · 1

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