CEN11CA039

NTSB accident investigation · Aeronca 7AC · Mount Vernon, MO · October 9, 2010

Accident · No injuriesData collectionFinal report
Date
October 9, 2010, 11:05 local (16:05 UTC)
Place
Mount Vernon, MO
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Taxi
Aircraft
N81412Aeronca 7AC
Defining event
Taxi-from runway: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report April 12, 2011
Report
Approved by Office Director
NTSB office
Central Region
Parties
FAA-Kansas City FSDO
FAA report
20101009049079A
Case key
77669

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 loss of directional control while taxiing.

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.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedAeronca 7AC: 26 casesAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotAeronca 7AC: 43 casesAll aircraft: 9,295 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 he landed on the grass airstrip and, while taxiing, a gust of wind from the right resulted in the airplane ground looping to the left. The airplane struck a fence and the airplane incurred substantial damage to the right wing spar. The pilot reported no preimpact mechanical malfunctions or failures with the airframe or engine that would have precluded normal operation.

Factual narrative

The pilot reported that he landed on the grass airstrip and while taxiing, a gust of wind from the right caused the airplane to ground loop to the left. The pilot stated that he believed the gust of wind came from a powerline clearing that was perpendicular to the runway. The airplane struck a fence during the. Initially, the damage was not believed to be substantial. Later examination of the airplane revealed that the front spar of the right wing was cracked. There were no systems anomalies with the airplane.

Aircraft

Registration
N81412
Reported as
Aeronca 7AC
Category
Airplane
Serial number
7AC-5
Airframe hours
3,194
Engine
Cont Motor A&C65 SERIES, 65 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 3, 2009
Departed
MU78 · Waynesville, MO
Destination
Mount Vernon, MO
Flight plan
Unknown
Airport
N/A · Private, runway 15, grass/turf

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
70
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
September 1, 2010
Seat
Front
Flight hours
6,000 total · 75 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
220° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 55 °F
Altimeter
30.07 inHg
Observed at
HFJ, 16 nm away

Docket · 1

The files NTSB released with the investigation on December 10, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 459 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.

Other investigations on N81412 · 1

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