CEN18LA131

NTSB accident investigation · Cessna 180 · Grove, OK · March 31, 2018

Accident · Minor injuriesLimited investigationFinal report
Date
March 31, 2018, 08:15 local (13:15 UTC)
Place
Grove, OK
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N2485CCessna 180
Defining event
Enroute: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report March 18, 2019
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20180331010439A
Case key
96958

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

A total loss of engine power due to carburetor ice accumulation. Contributing to the accident was the pilot’s failure to apply carburetor heat immediately following the loss of engine power.

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.

Temp/humidity/pressure: conducive to carburetor icingEnvironmental issues › Conditions/weather/phenomena · Effect on equipmentCessna 180: 3 casesAll aircraft: 435 casesProbable cause
Ice/rain protection system: intake anti-ice, deiceAircraft › Aircraft systems · Not used/operatedCessna 180: 2 casesAll aircraft: 108 casesProbable cause
Use of equip/info: use of equip/systemPersonnel issues › Task performance · PilotCessna 180: 5 casesAll aircraft: 1,391 casesProbable cause
Ice/rain protection system: intake anti-ice, deiceAircraft › Aircraft systems · Related operating infoCessna 180: 2 casesAll aircraft: 108 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 airline transport pilot reported that, while in cruise flight, the engine "coughed once, then died." The pilot attempted to restore power without success, then performed a forced landing to a rodeo arena. The pilot also stated that he did not apply carburetor heat following the loss of engine power. A postaccident examination of the airframe and engine revealed no evidence of mechanical malfunction or failures that would have precluded normal operation. A review of the recorded weather information in the area indicated that the atmospheric conditions at the time of the accident were conducive to the accumulation of serious icing at any power setting. The total loss of engine power was likely due to an accumulation of carburetor ice. Had the pilot immediately applied carburetor heat, it is possible that it would have cleared the ice and restored engine power.

Factual narrative

On March 31, 2018, about 0815 central daylight time, a Cessna 180 airplane, N2485C, was substantially damaged during a forced landing near Grove, Oklahoma. The airline transport pilot was not injured and the passenger sustained minor injuries. The flight was conducted under the provisions of Title 14 Code of Federal Regulations Part 91. Visual meteorological conditions prevailed and no Federal Aviation Administration (FAA) flight plan had been filed for the flight. The flight departed Circle S Farms Airport (AR91), Lowell, Arkansas, about 0800, and was en route to Grove Municipal Airport (KGMJ), Grove, Oklahoma. According to the pilot, he departed AR91 and was en route to KGMJ to purchase fuel. While en route the engine quit producing power. During a forced landing to a rodeo arena, both wings, the empennage, and the fuselage were substantially damaged. An examination of the airplane, including the engine and fuel system, revealed no mechanical anomalies that would have precluded normal operation. The closest routine aviation weather report, taken at 0815, recorded a temperature of 54°F and a dewpoint temperature of 41°F. A review of the carburetor icing probability chart, located in the Federal Aviation Administration's Special Airworthiness Information Bulletin CE-09-35, dated June 30, 2009, revealed that the airplane was operating in an area favorable for the formation of serious carburetor icing at any power setting.

Aircraft

Registration
N2485C
Reported as
Cessna 180
Category
Airplane
Serial number
30785
Built
1954
Airframe hours
2,777.3
Engine
Continental O470-J, 225 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
February 15, 2018
Departed
AR91 · Lowell, AR
Destination
KGMJ · Grove, OK
Equipment
Stall warning system, Onboard weather, 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
49
Injuries
None
Certificates
Airline transport, Flight engineer, Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
December 19, 2017
Seat
Left
Restraint
4-point
Flight hours
21,327 total · 124.3 in this make and model · 11,250 as pilot in command · 112.1 in the last 90 days · 41.2 in the last 30 days · 0.2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
54 °F, dew point 41 °F
Altimeter
30.06 inHg
Observed at
KGMJ

Docket · 3

The files NTSB released with the investigation on April 24, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 391 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.