ANC07LA079

NTSB accident investigation · Aeronca 7AC · Big Lake, AK · August 11, 2007

Accident · Minor injuriesLimited investigationFinal report
Date
August 10, 2007, 17:00 local (Aug 11, 2007, 01:00 UTC)
Place
Big Lake, AK
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N82192Aeronca 7AC
Weather
Visual (VMC) · Day
Status
Completed · report April 30, 2008
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration
FAA report
20070810023449A
Case key
66432

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 student pilot's failure to maintain adequate airspeed to avoid an inadvertent stall while maneuvering.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - in flightManeuvering
Airspeed(vs) - not maintainedPilot in commandCause
Stall - inadvertentPilot in commandCause
In flight collision with objectDescent - uncontrolled
Object - tree(s)

Analysis

The student pilot said that while en route to his intended destination airport, he decided to look at some lake front property. He said that as he made a right downwind turn over the lake, about 500 feet agl, the right wing stalled, and the airplane descended vertically. During the student's effort to recover from the stall, the right wing struck a tree on the lake's shoreline, and the airplane came to rest about 30 feet from shore. The student pilot reported there were no preaccident mechanical problems with the airplane.

Factual narrative

On August 10, 2007, about 1700 Alaska daylight time, a wheel-equipped Aeronca 7AC airplane, N82192, sustained substantial damage following a loss of control, and subsequent collision with trees, while maneuvering about 2 miles northeast of Big Lake, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country personal flight under Title 14, CFR Part 91 when the accident occurred. The solo student pilot sustained minor injuries. Visual meteorological conditions prevailed at the time of the accident, and no flight plan was filed. The flight originated at the Palmer Airport, Palmer, Alaska about 1600, and was en route to the Willow Airport, Willow, Alaska.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on August 12, the student pilot reported that that while en route to his destination airport, he elected to fly over a lake to view some property. He said that as he made a right, downwind turn, the right wing stalled, and the airplane descended nose first. He reported that he was able to level the wings just before the airplane's right wing struck a large tree, which pivoted the airplane to the right. The airplane descended vertically and came to rest in the lake, about 30 feet from the shoreline. The student pilot reported that there were no preaccident mechanical anomalies with the airplane.

Aircraft

Registration
N82192
Reported as
Aeronca 7AC
Category
Airplane
Serial number
819
Airframe hours
3,926.6
Engine
Continental C-90, 90 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Kevin J. Mielke
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 1, 2007 · 90 hours before
Departed
PAQ · Palmer, AK
Destination
UUO · Willow, AK

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
30
Injuries
Minor
Certificate
Student
Medical
Class 3, With waivers/limitations
Seat
Front
Flight hours
132 total · 132 in this make and model · 132 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 5 knots, gusting 20
Visibility
10 statute miles
Lowest ceiling
None
Temperature
75 °F

FAA reports on this event · 1

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