ANC20CA054

NTSB accident investigation · Cessna 120 · Gulkana, AK · May 24, 2020

Accident · No injuriesClass 4 · Data collectionFinal report
Date
May 23, 2020, 19:00 local (May 24, 2020, 03:00 UTC)
Place
Gulkana, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N72536Cessna 120
Defining event
Approach-VFR go-around: Collision during takeoff/land
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration
FAA report
20200523006669A
Case key
101374

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 pilot's failure to maintain proper airspeed during final approach to landing, and his subsequent failure to attain sufficient altitude to clear trees during an attempted go-around.

Findings · 5

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotCessna 120: 22 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Related operating infoCessna 120: 3 casesAll aircraft: 1,681 casesProbable cause
Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 120: 2 casesAll aircraft: 1,310 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 reported that while landing at an unimproved airstrip, his airspeed on final approach was too fast, and he decided to perform a go-around. During the go-around, the left main tire struck trees at the departure end of the airstrip and the airplane subsequently descended into the brush and trees. The right wing and right elevator sustained substantial damage. The pilot stated there were no preaccident mechanical malfunctions or anomalies that would have precluded normal operation. In the recommendation section of the NTSB Accident/Incident Reporting Form 6120.1, the pilot stated that the accident may have been prevented if he had been more aware of his limitations and the airplane's performance limitations.

Aircraft

Registration
N72536
Reported as
Cessna 120 (No Series)
Category
Airplane
Serial number
9706
Built
1946
Airframe hours
5,963
Engine
Continental C85- 12F, 85 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 18, 2020
Departed
GKN · Gulkana, AK
Destination
Gulkana, AK
Airport
runway N, 800 × 80 ft, dirt

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
41
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Left
Restraint
Lap only
Flight hours
198.3 total · 178.6 in this make and model · 16.7 in the last 90 days · 6.5 in the last 30 days · 3.5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
230° at 8 knots
Visibility
10 statute miles
Temperature
61 °F, dew point 36 °F
Altimeter
29.51 inHg
Observed at
PAGK, 17 nm away

Docket · 2

The files NTSB released with the investigation on October 9, 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.

Other investigations on N72536 · 1

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