ANC21LA072

NTSB accident investigation · Piper PA-18-150 · Rohn, AK · August 12, 2021

Accident · No injuriesClass 4 · LimitedFinal report
Date
August 12, 2021, 15:30 local (23:30 UTC)
Place
Rohn, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N4018EPiper PA-18-150
Defining event
Takeoff: Loss of control on ground
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
FAA/FSDO
FAA report
20210812013709A
Case key
103711

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 during the takeoff roll.

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 · PilotPiper PA-18-150: 160 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-18-150: 98 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

According to the pilot, during the takeoff roll on a rough ridge, the airplane “pulled” to the left, therefore he corrected the turn with right rudder. While applying the right rudder, the airplane struck a large hole, which resulted in his hunting boot becoming jammed in the rudder pedal. The pilot reduced engine power, and the airplane continued to turn 180° to the right. While in the turn, the left main landing gear collapsed, which resulted in substantial damage to the left wing and left elevator. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Aircraft

Registration
N4018E
Reported as
Piper PA-18-150
Category
Airplane
Serial number
18-7809040
Built
1977
Airframe hours
389
Engine
Lycoming O-320-A2B, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 18, 2021
Destination
LHD · Anchorage, AK
Equipment
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
39
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land, Single-engine sea
Medical
Class 3, Without waivers/limitations
Last flight review
July 9, 2021
Seat
Front
Restraint
4-point
Flight hours
628 total · 469 in this make and model · 592 as pilot in command · 77 in the last 90 days · 30 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 5 knots, gusting 10
Visibility
20 statute miles
Lowest ceiling
None
Temperature
50 °F

Docket · 3

The files NTSB released with the investigation on April 18, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.5 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 N4018E · 1

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