ANC20CA056

NTSB accident investigation · Piper PA18 · Nikiski, AK · June 2, 2020

Accident · No injuriesClass 4 · Data collectionFinal report
Date
June 1, 2020, 20:20 local (Jun 2, 2020, 04:20 UTC)
Place
Nikiski, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N8987YPiper PA18
Defining event
Approach-VFR pattern final: Loss of control in flight
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
20200602007559A
Case key
101377

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 landing in gusting wind conditions, which resulted in a ground loop.

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 was landing the tailwheel and tundra tire-equipped airplane on a remote unimproved airstrip. While on final approach and just before touchdown, a gust of wind pushed the airplane to the left. The left wing contacted alder brush and the airplane veered to the left and ground looped sustaining substantial damage to the right wing. The pilot reported no preaccident mechanical failures or malfunctions that would have precluded normal operations. 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 waited for a day without gusting wind conditions.

Factual narrative

The pilot was landing the tailwheel and tundra tire-equipped airplane on a remote unimproved airstrip. While on final approach and just before touchdown, a gust of wind pushed the airplane to the left. The left wing contacted alder brush and the airplane veered to the left and ground looped sustaining substantial damage to the right wing. The pilot reported no preaccident mechanical failures or malfunctions that would have precluded normal operations. 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 waited for a day without gusting wind conditions.

Aircraft

Registration
N8987Y
Reported as
Piper PA18 (150)
Category
Airplane
Serial number
18-7409132
Built
1974
Airframe hours
2,028.4
Engine
Lycoming O-320 SERIES, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 14, 2019
Departed
PASX · Soldotna, AK
Destination
Nikiski, AK
Flight plan
VFR
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
43
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
March 27, 2020
Seat
Front
Flight hours
525.2 total · 525.2 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 10 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 34 °F
Altimeter
29.54 inHg
Observed at
PAEN

Docket · 2

The files NTSB released with the investigation on August 10, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 7.5 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 N8987Y · 1

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