ANC18CA068

NTSB accident investigation · Piper PA18 · Wasilla, AK · August 25, 2018

Accident · Minor injuriesData collectionFinal report
Date
August 25, 2018, 14:10 local (22:10 UTC)
Place
Wasilla, AK
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N5392YPiper PA18
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report August 3, 2020
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration
FAA report
20180825022299A
Case key
98189

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 landing roll when the left main landing gear wheel got caught in a ditch, which resulted in a subsequent nose-over.

Findings · 3

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
Terrain: sloped/uneven terrainEnvironmental issues › Physical environment · Effect on operationPiper PA-18-150: 10 casesAll aircraft: 270 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 landing roll on a private grass airstrip, the left main landing gear wheel became caught in the ditch that was obscured by long grass along the edge of the runway. He subsequently lost directional control, and the airplane rolled into the ditch and nosed over, which resulted in substantial damage to the wings, vertical stabilizer, and rudder. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Factual narrative

The pilot reported that during the landing roll at a private grass airstrip in his tailwheel-equipped airplane, the left main landing gear wheel descended into a ditch that was obscured in long grass along the edge of the runway. He subsequently lost directional control, and the airplane veered left into the ditch and nosed over, causing substantial damage to the left wing. The pilot reported no mechanical malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N5392Y
Reported as
Piper PA18 (150)
Category
Airplane
Serial number
18-8145
Built
1964
Engine
Lycoming O-320 SERIES, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Departed
BCV · Birchwood, AK
Destination
BCV · Birchwood, AK
Airport
5AK5 · Todds Strip, runway 07, 1,500 × 60 ft, gravel

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
79
Injuries
Minor
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Seat
Front
Restraint
4-point
Flight hours
6,400 total · 6,100 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 48 °F
Altimeter
29.93 inHg
Observed at
PAWS, 6 nm away

Docket · 3

The files NTSB released with the investigation on May 28, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 10.2 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.