WPR20CA058

NTSB accident investigation · Aeronca 11AC · San Diego, CA · November 25, 2019

Accident · No injuriesData collectionFinal report
Date
November 25, 2019, 13:30 local (21:30 UTC)
Place
San Diego, CA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9510EAeronca 11AC
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report June 16, 2020
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20191125018539A
Case key
100770

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 failure to maintain directional control during the landing roll with a quartering tailwind, which resulted in a collision with an airport sign and subsequent ground-loop.

Findings · 4

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 11AC: 13 casesAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotAeronca 11AC: 14 casesAll aircraft: 9,295 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on operationAeronca 11AC: 3 casesAll aircraft: 594 casesProbable cause
Object/animal/substance: sign/markerEnvironmental issues › Physical environment · Effect on operationAeronca 11AC: 2 casesAll aircraft: 214 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, due to a quartering tailwind, he conducted a wheel landing in the tailwheel-equipped airplane. Shortly after touchdown, the airplane was pushed toward the left side of the runway. The pilot attempted to correct the drift by applying full right rudder and power to no avail. The airplane subsequently struck a sign along the edge of the runway and ground looped, which resulted in substantial damage to the aft fuselage. 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 reported that due to a quartering tailwind, he conducted a wheel landing in the tailwheel equipped airplane. Shortly after touchdown, the airplane was pushed toward the left side of the runway. The pilot attempted to realign the airplane with full right rudder and power to correct the drift, but to no avail. The airplane subsequently struck a sign along the edge of the runway and ground looped, substantially damaging the aft fuselage. The pilot reported that there were no mechanical failures or malfunctions that would have precluded normal operation.

Aircraft

Registration
N9510E
Reported as
Aeronca 11AC (No Series)
Category
Airplane
Serial number
11AC-1146
Built
1946
Airframe hours
1,305
Engine
Continental A65-8, 65 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 1, 2019 · 50 hours before
Departed
MYF · San Diego, CA
Destination
MYF · San Diego, CA
Airport
MYF · Montgomery-Gibbs Executive Air, runway 28R, 4,598 × 150 ft, asphalt
Equipment
Unknown

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
63
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
August 1, 2019
Seat
Left
Restraint
3-point
Flight hours
1,549 total · 69 in this make and model · 1,460 as pilot in command · 28 in the last 90 days · 6 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
66 °F, dew point 50 °F
Altimeter
29.85 inHg
Observed at
MYF

Docket · 2

The files NTSB released with the investigation on March 31, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 10.9 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.