CEN19LA311

NTSB accident investigation · Cessna 172 · Grassy Butte, ND · September 10, 2019

Accident · Serious injuriesClass 3 · LimitedFinal report
Date
September 10, 2019, 12:30 local (17:30 UTC)
Place
Grassy Butte, ND
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N5347TCessna 172
Defining event
Initial climb: Fuel contamination
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20190910018619A
Case key
100230

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

A total loss of engine power due to water contamination of the fuel, and the pilot's failure to conduct a preflight inspection.

Findings · 4

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.

Fluids: fuelAircraft › Fluids/misc hardware · Inadequate inspectionCessna 172E: 9 casesAll aircraft: 1,695 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid conditionCessna 172E: 9 casesAll aircraft: 1,695 casesProbable cause
Action: lack of actionPersonnel issues › Action/decision · Student/instructed pilotCessna 172E: 1 caseAll aircraft: 792 casesProbable cause
Inspection: preflight inspectionPersonnel issues › Task performance · Student/instructed pilotCessna 172E: 3 casesAll aircraft: 551 casesProbable cause

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

The student pilot reported that he recently fueled the airplane with fuel from an external supply tank on his ranch. On the day of the accident, the pilot taxied the airplane to a north-south road and started the takeoff roll to the north. The airplane lifted off and climbed to about 40 ft above ground level when the engine experienced a total loss of power. The pilot made a left turn to land in a parallel field; the airplane landed hard and came to rest upright, sustaining substantial damage to the left wing and fuselage. Postaccident examination revealed a significant amount of water in the carburetor and in the airplane's fuel tanks. Water was also found in the supply tank from which the pilot fueled the airplane. The pilot reported that he did not check the airplane's fuel tanks for contamination before departing on the flight, nor had he checked the fuel supply tank for contamination. The circumstances of the accident are consistent with a total loss of engine power due to water contamination of the fuel system.

Factual narrative

On September 10, 2019, about 1230 central daylight time, a Cessna 172, N5347T, impacted terrain shortly after takeoff from a road near Grassy Butte, North Dakota. The pilot sustained serious injuries and the airplane was substantially damaged. The airplane was registered to (registration expired) and operated by the pilot under the provisions of Title 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed at the time of the accident and no flight plan had been filed. The local flight was originating at the time of the accident. According to local law enforcement and the responding Federal Aviation Administration (FAA) inspector, the pilot used the airplane to monitor the cattle on his ranch. The pilot stated that he was departing from the road to the north and climbed to about 40 ft above ground level when the engine experienced a total loss of power. The pilot made a left turn and landed hard in the field parallel to the road. Figure 1 shows the airplane where it came to rest in the field. Figure 1 – The accident airplane upright in a field The FAA inspector completed a preliminary examination of the airplane. He reported that a significant amount of water was found in the carburetor and the airplane's fuel tanks. Also, water was found in the supply fuel tank from which the pilot fueled the airplane. A local mechanic who had possession of the maintenance logbooks stated that a recent annual inspection had not been completed and the airplane was not in good shape overall. After the accident the pilot stated that before takeoff he did not check the airplane's fuel tanks for contamination nor did he check the external fuel supply tank for contamination.

Aircraft

Registration
N5347T
Reported as
Cessna 172 (E)
Category
Airplane
Serial number
17251247
Built
1964
Engine
Continental O-300 SER, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Departed
Grassy Butte, ND
Destination
Grassy Butte, ND

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
61
Injuries
Serious
Certificate
Student
Medical
Class 3, Without waivers/limitations
Seat
Left
Flight hours
250 total

Weather

Conditions
Visual (VMC) · Day
Observed at
KS25, 29 nm away

Docket · 4

The files NTSB released with the investigation on January 29, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 550 KB 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.

Other investigations on N5347T · 1

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