ANC22LA028

NTSB accident investigation · Cessna 172H · Chugiak, AK · April 10, 2022

Accident · No injuriesClass 3 · LimitedFinal report
Date
April 10, 2022, 13:20 local (21:20 UTC)
Place
Chugiak, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N8020LCessna 172H
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Alaska Regional Office
Parties
FAA
FAA report
20220410004609A
Case key
104935

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 directional control while landing, which resulted in a runway excursion and nose over.

Findings · 2

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 172H: 15 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 172H: 5 casesAll aircraft: 3,958 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, upon touchdown on the asphalt runway, the airplane veered abruptly to the right. The airplane exited the runway, impacted a snowbank, and nosed over, resulting in substantial damage to the vertical stabilizer, rudder, and wings. Examination of the nose landing gear system revealed no pre-accident mechanical malfunctions or failures that would have precluded normal operation. An examination of the landing surface revealed tire witness marks consistent with the airplane touching down in a left-wing-low attitude and evidence that the right main tire did not contact the ground until after the airplane had departed the runway. Based on the tire witness marks and the lack of preaccident mechanical malfunctions with the airplane, the circumstances of the accident are consistent with the pilot’s failure to maintain directional control during the landing roll.

Factual narrative

On April 10, 2022, about 1320 Alaska standard time, a Cessna 172H airplane, N8020L, sustained substantial damage when it was involved in an accident near Birchwood, Alaska. The pilot was not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that he was landing his tricycle-gear-equipped airplane. Upon touchdown on the asphalt runway, the airplane veered abruptly to the right. He attempted to correct to no avail. The airplane exited the runway, impacted a snowbank, and nosed over, resulting in substantial damage to the vertical stabilizer, rudder, and wings. Examination of the nose landing gear system revealed no pre-accident mechanical malfunctions or failures that would have precluded normal operation. An examination of the landing surface revealed tire witness marks consistent with the airplane touching down on the left main tire in a left-wing-low attitude. The right main tire did not contact the ground until after the airplane had departed the runway surface.

Aircraft

Registration
N8020L
Reported as
Cessna 172H
Category
Airplane
Serial number
17256220
Built
1967
Airframe hours
6,879
Engine
Cont Motor O-320-E2D, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Denali Flyers LLC
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 8, 2021 · 52 hours before
Departed
PAUO · Willow, AK
Destination
PAMR · Anchorage, AK
Flight plan
VFR
Airport
PABV · Birchwood, runway 20R, 4,012 × 100 ft, asphalt
Equipment
ADS-B

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
62
Injuries
None
Certificate
Private
Airplane ratings
Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 3, With waivers/limitations
Last flight review
May 30, 2021
Seat
Left
Flight hours
1,800 total · 500 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
36 °F, dew point 12 °F
Altimeter
30.67 inHg
Observed at
PABV
METAR
PABV 102156Z AUTO 00000KT 10SM CLR 02/M11 A3067 RMK AO2 SLP392 T00171106 FZRANO

Docket · 2

The files NTSB released with the investigation on August 23, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.0 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 N8020L · 1

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