CEN21LA037

NTSB accident investigation · Aeronca 11AC · Wabash, IN · October 28, 2020

Accident · No injuriesClass 4 · LimitedFinal report
Date
October 28, 2020, 13:30 local (17:30 UTC)
Place
Wabash, IN
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Standing
Aircraft
N9171EAeronca 11AC
Defining event
Standing-engine(s) start-up: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Central Region
Parties
FAA -- Flight Standards
FAA report
20201028015939A
Case key
102213

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 properly secure the airplane before beginning the engine start sequence.

Findings · 1

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: use of equip/systemPersonnel issues › Task performance · PilotAeronca 11AC: 5 casesAll aircraft: 1,391 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 turning the engine through when it started unexpectedly. He attempted to get back into the cockpit to shut the engine down but was unsuccessful. The airplane self-taxied in an arc and struck the hangar before coming to a stop. The airplane sustained substantial damage to the right wing. The pilot noted that the magneto switch was in the BOTH position when he checked it after the accident, and he did not recall turning it on.

Aircraft

Registration
N9171E
Reported as
Aeronca 11AC (NO SERIES)
Category
Airplane
Serial number
11AC-802
Built
1946
Airframe hours
1,728
Engine
Continental A65-8, 65 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 1, 2020 · 25 hours before
Departed
IWH · Wabash, IN
Airport
IWH · Wabash Municipal

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
73
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Sport pilot
Last flight review
September 17, 2019
Seat
Left
Restraint
Lap only
Flight hours
208 total · 75 in this make and model · 208 as pilot in command · 7 in the last 90 days · 2 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
280° at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
7 °F, dew point 1 °F
Altimeter
30.07 inHg
Observed at
HHG, 16 nm away

Docket · 3

The files NTSB released with the investigation on August 4, 2021, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.1 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.