# NTSB CHI93LA236: Aeronca 7AC, N83429, Waukesha, WI, June 27, 1993

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: June 27, 1993, 06:50 local (11:50 UTC)
- Place: Waukesha, WI
- Location: 43.0091° N, 88.2451° W: Placed by OpenAirDocs: center of Waukesha, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.0091&lon=-88.2451&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report August 17, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 9230
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI93LA236
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/9230/pdf
- Page: https://openairdocs.org/ntsb/CHI93LA236

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN AIRSPEED ABOVE A STALL.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of control - in flight, maneuvering
  - airspeed - not maintained, pilot in command (cause)
  - stall/spin - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE PILOT WAS ON A LOCAL SIGHTSEEING FLIGHT.  ACCORDING TO HIS STATEMENT, WHILE MAKING A LEFT TURN TO BETTER VIEW A CAMPING SITE, THE AIRPLANE STALLED.  IN AN ATTEMPT TO RECOVER, HE ADDED POWER.  THE AIRPLANE THEN ENTERED INTO A SPIN AND IMPACTED THE TREES BELOW.  THE PILOT REPORTED NO PREIMPACT MECHANICAL DIFFICULTIES WITH THE AIRPLANE.

## Factual narrative

On June 27, 1993, about 0650 central daylight time, an Aeronca 7AC airplane, N83429, sustained substantial damage when it collided with trees near Waukesha, Wisconsin.  The solo private pilot received minor injuries.  Visual meteorological conditions prevailed for the local pleasure flight.  The flight operated without flight plan under 14 CFR Part 91.

The pilot was on a local sightseeing flight.  According to his statement, while making a left turn to better view a camping site, the airplane stalled.  In an attempt to recover, the pilot added power.  The airplane then entered into a spin and impacted the trees below.

The pilot reported no preimpact mechanical anomalies with the airplane.

## Aircraft

- Registration: [N83429](https://openairdocs.org/aircraft/N83429), registered now, S/N 7AC-2096, built 1946 (OpenAirDocs)
- Reported make and model: AERONCA 7AC
- Registry model: [Aeronca 7AC](https://openairdocs.org/model/aeronca-7ac) (registry code 2110102) (OpenAirDocs)
- Registry engine: [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series) (registry code 17003, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 2096
- Airframe hours: 6500
- Engines: CONTINENTAL A-65-8F 65 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: John And Carol Karlman
- Registered owner: John And Carol Karlman
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 11, 1993, 23 hours before
- Departed: RYV, WATERTOWN, WI

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 62; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: rear; flight hours: 485 total, 190 in this make and model, 425 as pilot in command, 25 in the last 90 days, 20 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 6 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 70 °F
- Altimeter: 29.00 inHg
- Observed at: UES, 23 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 (OpenAirDocs).

- [Accident 19930627020519A](https://openairdocs.org/incident/19930627020519A), Jun 27, 1993: Bbavia 7AC, Waukesha, WI, Substantial damage. Local sightseeing flight. Stalled in steep turn over a campsight. Spun into trees. Pilot error and judgement factor

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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