NYC08CA325

NTSB accident investigation · Aeronca 7AC · Mt. Pleasant, SC · September 28, 2008

Accident · No injuriesData collectionFinal report
Date
September 28, 2008, 17:15 local (21:15 UTC)
Place
Mt. Pleasant, SC
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Emergency descent
Aircraft
N2504EAeronca 7AC
Defining event
Emergency descent: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report January 22, 2009
Report
Approved by Office Director
Parties
FAA/FSDO
FAA report
20080928855339A
Case key
69014

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 aircraft control during an emergency maneuver. Contributing to the accident was the failure of the left magneto.

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotAeronca 7AC: 43 casesAll aircraft: 9,295 casesProbable cause
Ignition system: magneto/distributorAircraft › Aircraft power plant · FailureAeronca 7AC: 1 caseAll aircraft: 101 casesProbable cause
Performance/control parametersAircraft › Aircraft oper/perf/capability · Not attained/maintainedAeronca 7AC: 4 casesAll aircraft: 1,269 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 Aeronca 7AC stated that during the engine run-up for departure, he observed that the right magneto "failed." The pilot taxied the airplane back to the ramp, and a mechanic serviced the right magneto. The pilot then performed another engine run-up, which was satisfactory, and the airplane departed on runway 17. About 50 feet above ground level, the engine lost partial power. The pilot attempted a left turn back toward the airport, as there were trees in front of him. During the turn, the airplane stalled and impacted terrain. Examination of the wreckage revealed an inoperative left magneto.

Factual narrative

The pilot of the Aeronca 7AC stated that he intended to fly to another airport, and have an annual inspection completed on his airplane. During the engine run-up for departure, the pilot observed that the right magneto "failed." The pilot taxied the airplane back to the ramp, and a mechanic serviced the right magneto. The pilot then performed another engine run-up, which was satisfactory, and the airplane departed on runway 17. About 50 feet above ground level, the engine lost partial power. The pilot attempted a left turn back toward the airport, as there were trees in front of him. During the turn, the airplane stalled, impacted terrain, and sustained damaged to the left wing, forward fuselage, and landing gear. The airplane was manufactured in 1946, and its most recent annual inspection was completed about 14 months prior to the accident. The airplane had accumulated 7 hours of operation since that inspection. The pilot reported a total flight experience of 2,055 hours; of which, 104 hours were in the accident airplane. The pilot had not flown during the 90-day period preceding the accident. Examination of the wreckage by a Federal Aviation Administration inspector revealed an inoperative left magneto.

Aircraft

Registration
N2504E
Reported as
Aeronca 7AC
Category
Airplane
Serial number
7AC-6086
Airframe hours
1,031
Engine
Continental Motors AC-65-8, 65 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
James Valentine
Registered owner
James Valentine
Airworthiness certificate
Standard, Normal
Last inspection
Annual · August 1, 2007 · 7 hours before
Departed
LRO · Mt. Pleasant, SC
Destination
MKS · Moncks Corner, SC
Airport
LRO · Mt. Pleasant Regional Airport, runway 17, 3,700 × 75 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
71
Injuries
None
Certificate
Private
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Sport pilot
Last flight review
September 20, 2006
Seat
Front
Flight hours
2,055 total · 104 in this make and model · 2,044 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 11 knots
Visibility
10 statute miles
Lowest ceiling
5,500 ft broken
Temperature
82 °F, dew point 61 °F
Altimeter
29.94 inHg
Observed at
LRO, 15 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.