CEN12LA129

NTSB accident investigation · Aviat A-1C-180 · Chetek, WI · January 6, 2012

Accident · Minor injuriesLimited investigationFinal report
Date
January 6, 2012, 12:15 local (18:15 UTC)
Place
Chetek, WI
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N11HYAviat A-1C-180
Defining event
Landing-aborted after touchdown: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report November 7, 2012
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20120106000099A
Case key
82661

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 passenger’s interference with the flight controls, which resulted in the airplane’s failure to climb after an aborted landing. Contributing was the pilot's failure to maintain directional control during landing roll, which resulted in the need to abort the landing.

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.

ActionPersonnel issues › Action/decision · PassengerAviat A-1C-180: 1 caseAll aircraft: 111 casesProbable cause
Performance/control parametersAircraft › Aircraft oper/perf/capability · Attain/maintain not possibleAviat A-1C-180: 4 casesAll aircraft: 1,269 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedAviat A-1C-180: 11 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 returning from a local flight with a passenger seated in the rear seat of the airplane. The pilot stated that during the landing roll, the airplane drifted toward the right edge of the runway due to a strong wind gust from the left. The pilot aborted the landing, and during the climb, without his input, the control stick moved to the right and rearward, and the airplane impacted the ground. The pilot said that he had advised the passenger to remain clear of the control stick. However, it is likely that the passenger did move the control stick during the attempted climb. The pilot's postaccident recommendation was that passengers should be briefed and reminded to keep their feet and legs clear of the control stick. The pilot indicated that there were no preimpact mechanical malfunctions or anomalies that would have precluded normal operation.

Factual narrative

On January 6, 2012, about 1215 central standard time, an Aviat Aircraft Inc A-1C-180, N11HY, impacted terrain during an aborted landing on runway 35 (3,401 feet by 60 feet, dry asphalt), Chetek Municipal-Southworth Airport (Y23), Chetek, Wisconsin. The certificated private pilot and a passenger sustained minor injuries. The airplane sustained substantial damage to the wings and firewall. The airplane was registered to Aerosource LLC and operated by the pilot under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed and a flight plan had not been filed for the local flight that originated from Y23 at 1115. The pilot stated that he briefed his grandson to keep clear of the control stick. They then departed on a local flight with his grandson seated in the rear seat. They returned to the departure airport where the pilot aborted the landing due to a gust of wind that pushed the airplane toward the right side of the runway. After liftoff from the aborted landing, the control stick moved uncommanded to the right and aft about 100 feet above ground level. The pilot was unable to move the control stick. The airplane entered a "hard" right descending turn and then impacted the ground. The pilot stated the control stick is "quite large," and the rear seat is not adjustable. The pilot's recommendation was that passengers should be briefed and reminded to keep their feet and legs clear of the control stick. He also stated that the control stick be removed when small children and new passengers are aboard. The pilot indicated that there were no mechanical malfunctions with the airplane.

Aircraft

Registration
N11HY
Reported as
Aviat A-1C-180
Category
Airplane
Serial number
114-B
Airframe hours
24
Engine
Lycoming O-360-AIP, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Pilot
Registered owner
Aerosource LLC
Airworthiness certificate
Standard, Utility
Departed
Y23 · Chetek, WI
Destination
Y23 · Chetek, WI
Airport
Y23 · Chetek Municipal-Southworth Ai, runway 35, 3,401 × 60 ft, asphalt

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
58
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
October 2, 2011
Seat
Front
Flight hours
974 total · 15 in this make and model · 906 as pilot in command · 37 in the last 90 days · 8 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
41 °F, dew point 30 °F
Altimeter
29.69 inHg
Observed at
RPD, 10 nm away

Docket · 2

The files NTSB released with the investigation on September 24, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 682 KB 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.