GAA19CA586

NTSB accident investigation · Piper PA 12 · Williams, CA · September 27, 2019

Accident · No injuriesData collectionFinal report
Date
September 27, 2019, 13:30 local (20:30 UTC)
Place
Williams, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Taxi
Aircraft
N3985MPiper PA 12
Defining event
Taxi: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report March 17, 2020
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20190927024099A
Case key
100398

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's over application of power during recovery from a runway excursion, which resulted in a ground loop and 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.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Incorrect use/operationPiper PA-12: 31 casesAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotPiper PA-12: 51 casesAll aircraft: 9,295 casesProbable cause
Terrain: sloped/uneven terrainEnvironmental issues › Physical environment · Effect on operationPiper PA-12: 3 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 of the tailwheel-equipped airplane reported that, after landing on a gravel road, he looked to the right and unintentionally steered the airplane to the right into a small ditch. He applied power to force the airplane out of the ditch back onto the road, however, the right main landing gear "locked up due to the weeds wrapping around it". The airplane ground looped and nosed over. The airplane sustained substantial damage to both wings and empennage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Factual narrative

The pilot of the tailwheel-equipped airplane reported that, after landing on a gravel road, he looked to the right and unintentionally steered the airplane to the right into a small ditch. He applied power to force the airplane out of the ditch back onto the road, however, the right main landing gear "locked up due to the weeds wrapping around it". The airplane ground looped and nosed over. The airplane sustained substantial damage to both wings and empennage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N3985M
Reported as
Piper PA 12 (No Series)
Category
Airplane
Serial number
12-2865
Built
1947
Airframe hours
1,128.9
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · October 25, 2018
Departed
O08 · Colusa, CA
Destination
WLW · Willows, CA
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
56
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, With waivers/limitations
Last flight review
July 5, 2019
Seat
Front
Flight hours
1,291 total · 355 in this make and model · 1,080 as pilot in command · 19 in the last 90 days · 6 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
150° at 9 knots
Visibility
10 statute miles
Lowest ceiling
3,100 ft overcast
Temperature
73 °F, dew point 57 °F
Altimeter
29.86 inHg
Observed at
KMYV, 25 nm away

Docket · 2

The files NTSB released with the investigation on December 5, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.4 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.