CEN19LA006

NTSB accident investigation · Cessna 120 · Hudson, CO · October 13, 2018

Accident · Minor injuriesLimited investigationFinal report
Date
October 13, 2018, 15:30 local (21:30 UTC)
Place
Hudson, CO
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N1881NCessna 120
Defining event
Approach-VFR go-around: Loss of engine power (partial)
Weather
Visual (VMC) · Day
Status
Completed · report September 14, 2020
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20181013019949A
Case key
98471

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

The partial loss of engine power for reasons that could not be determined based on the available information.

Findings · 1

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.

Not determinedNot determined › Not determined · Unknown/Not determinedCessna 120: 7 casesAll aircraft: 2,247 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 pilot was attempting to land with quartering tailwind. He stated that he noticed a strong crosswind and decided to go around. During the go-around, the pilot added engine power; however, the engine did not develop full power. The engine began to sputter and surge as the airplane continued to climb but did not regain power, so the pilot performed a forced landing to a field. The airplane nosed over and sustained substantial damage. A postaccident engine test run was performed. The engine started without hesitation, but damage to the engine and propeller prevented testing the maximum power setting. Although the engine operation during the go-around is similar to that which would be experienced if carburetor ice had accumulated during the approach, the weather conditions at the time were just outside those at which ice would accumulate. Therefore, the reason for the partial loss of engine could not be determined.

Factual narrative

***This report was modified on September 3, 2020. Please see the docket for this accident to view the original report.*** On October 13, 2018, about 1500 mountain daylight time, a Cessna 120 airplane, N1881N, was substantially damaged when it was involved in an accident near Fort Lupton, Colorado. The pilot and passenger both sustained serious injuries. The airplane was operated by a private individual as a Title 14 Code of Federal Regulations Part 91 personal flight. According to a statement provided by the pilot, while attempting to land on runway 33 at Platte Valley Airpark (18V), Hudson, Colorado, the pilot noticed a strong crosswind and decided to go around. During the go-around, the pilot added engine power the engine did not develop full power. The engine began to sputter and surge as the airplane continued to climb. The engine did not regain power, so the pilot performed a forced landing to a field. The airplane settled into a cornfield and nosed over. The airplane was transported to a salvage facility and the engine set up for a functional test run. The engine started without hesitation and ran at idle power without incident. Damage to the engine and propeller prevented testing the maximum power setting. A review of carburetor icing probability chart found that the airplane was not operating in an area at the edge of having the potential for icing at a glide power setting. During recovery of the airplane about 7 gallons of fuel was recovered from both tanks.

Aircraft

Registration
N1881N
Reported as
Cessna 120 (No Series)
Category
Airplane
Serial number
12125
Built
1946
Engine
Continental C85 SERIES, 85 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Departed
CO12 · Brighton, CO
Destination
18V · Hudson, CO
Airport
18V · Platte Valley Airpark, runway 33, 4,100 × 40 ft, asphalt

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
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Left
Restraint
3-point
Flight hours
610 total · 51 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 13 knots
Visibility
10 statute miles
Temperature
63 °F, dew point 27 °F
Altimeter
29.71 inHg
Observed at
KDEN, 17 nm away

Docket · 7

The files NTSB released with the investigation on June 19, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.7 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.