GAA18CA371

NTSB accident investigation · Air Tractor AT 301 · Hutchinson, MN · June 20, 2018

Accident · No injuriesData collectionFinal report
Date
June 20, 2018, 11:00 local (16:00 UTC)
Place
Hutchinson, MN
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N3169DAir Tractor AT 301
Defining event
Maneuvering-low-alt flying: Fuel exhaustion
Weather
Visual (VMC) · Day
Status
Completed · report March 18, 2019
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20180620017049A
Case key
97554

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 preflight fuel planning, which resulted in fuel exhaustion and the subsequent total loss of engine power.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Planning/preparation: fuel planningPersonnel issues › Task performance · PilotAir Tractor AT-301: 4 casesAll aircraft: 719 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid levelAir Tractor AT-301: 7 casesAll aircraft: 1,695 casesProbable cause
Terrain: wet/muddy terrainEnvironmental issues › Physical environment · Contributed to outcomeAir Tractor AT-301: 1 caseAll aircraft: 110 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

According to the pilot in the tailwheel-equipped airplane, during an agricultural application flight, he accidentally loaded more fertilizer to disperse than he had initially planned, which made the airplane "heavy." He chose not to add fuel to prevent the airplane from being over its gross weight. During flight, the engine lost power, and the pilot conducted a forced landed in a dirt field that was water-logged due to recent storms. During the landing roll, the airplane nosed over. The pilot reported that "I misjudged what I believed to be a safe quantity of fuel remaining." The airplane sustained substantial damage to the rudder and vertical stabilizer. The pilot reported that there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Factual narrative

According to the pilot in the tailwheel-equipped airplane, during an aerial application flight the pilot took onboard more product to disperse than he had initially planned. The airplane was heavy, and he chose not to take on additional fuel, to prevent an over-gross weight scenario. However, during flight the engine lost power and he forced landed in a dirt field that was water-logged due to recent storms. During the landing roll, the airplane nosed over. The pilot reported that, "I misjudged what I believed to be a safe quantity of fuel remaining." The airplane sustained substantial damage to the rudder and vertical stabilizer. The pilot reported that there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Aircraft

Registration
N3169D
Reported as
Air Tractor AT 301 (NO SERIES)
Category
Airplane
Serial number
301-0569
Built
1984
Engine
Pratt and Whitney R1340, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Classic Arrow Inc
Registered owner
Classic Arrow Inc
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · April 10, 2018
Departed
HCD · Hutchinson, MN
Destination
HCD · Hutchinson, MN
Airport
HCD · Hutchinson Muni-Butler Field
Equipment
Handheld GPS

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
47
Injuries
None
Certificates
Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
January 27, 2017
Seat
Single
Restraint
4-point
Flight hours
3,350 total · 40 in this make and model · 3,290 as pilot in command · 152 in the last 90 days · 152 in the last 30 days · 9 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
80° at 11 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 59 °F
Altimeter
29.92 inHg
Observed at
KHCD, 2 nm away

Docket · 2

The files NTSB released with the investigation on December 20, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.8 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.