ANC20CA096

NTSB accident investigation · Piper PA18 · Chitina, AK · September 12, 2020

Accident · No injuriesClass 4 · Data collectionFinal report
Date
September 11, 2020, 19:15 local (Sep 12, 2020, 03:15 UTC)
Place
Chitina, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N416RKPiper PA18
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
FAA report
20200911018819A
Case key
101976

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 loss of directional control during takeoff, which resulted in a runway excursion.

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

The pilot reported that during the takeoff downhill, from an unimproved airstrip, the airplane “rolled over a bump”, became airborne, and yawed slightly right. The pilot attempted to correct for the loss of directional control to no avail. Subsequently, the airplane drifted, exited the airstrip, and came to rest in the trees. The airplane sustained substantial damage to the left wing. The pilot reported no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N416RK
Reported as
Piper PA18 (150)
Category
Airplane
Serial number
18-8434
Built
1966
Airframe hours
2,390.7
Engine
Lycoming O-320-A2B, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Windyfork LLC
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 11, 2020
Destination
15Z · McCarthy, AK
Airport
N/A · Nizina Strip, runway E/W, 2,200 × 100 ft, grass/turf
Equipment
None

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
63
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
June 24, 2019
Seat
Front
Restraint
4-point
Flight hours
1,075 total · 14 in this make and model · 1,028 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
48 °F, dew point 39 °F
Altimeter
30.18 inHg
Observed at
PACV, 1 nm away

Docket · 2

The files NTSB released with the investigation on September 20, 2021, on NTSB’s docket system: statements, records, photos and specialists’ reports. 16.9 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 N416RK · 1

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