# NTSB CHI90LA133: Champion 7EC, N4352C, Hamilton, OH, May 11, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 11, 1990, 19:30 local (23:30 UTC)
- Place: Hamilton, OH
- Coordinates: 39.379669, -84.570983 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.3797&lon=-84.5710&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 4, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 14671
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI90LA133
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14671/pdf
- Page: https://openairdocs.org/ntsb/CHI90LA133

## Probable cause

FAILURE OF THE PILOT TO MAINTAIN DIRECTIONAL CONTROL, WHICH RESULTED IN AN INADVERTENT GROUND SWERVE.

## Sequence of events

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

- Loss of control - on ground/water, landing
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - inadvertent, pilot in command (cause)
- On ground/water collision with object, landing
  - object - tree(s)

## Analysis

THE PILOT WITH A PASSENGER HAD CONCLUDED A LOCAL FLIGHT WITH PRACTICE TAKEOFFS AND LANDINGS. DIRECTIONAL CONTROL WAS LOST ON THE SECOND LANDING AND THE AIRCRAFT DEPARTED THE RUNWAY TO THE LEFT, CROSSED A DITCH & TAXIWAY, AND IMPACTED TREES. THE AIRCRAFT SUSTAINED SUBSTANTIAL DAMAGE, HOWEVER THE OCCUPANTS REPORTED NO INJURIES. SUBSEQUENT INVESTIGATION OF THE AIRCRAFT'S BRAKES AND WHEEL BEARINGS REVEALED NOTHING THAT WOULD HAVE HAD AN ADVERSE IMPACT ON THE AIRCRAFT'S PERFORMANCE.

## Aircraft

- Registration: [N4352C](https://openairdocs.org/aircraft/N4352C), registered now, S/N 7EC-371, built 1955 (OpenAirDocs)
- Reported make and model: CHAMPION 7EC
- Registry model: [Champion 7EC](https://openairdocs.org/model/champion-7ec) (registry code 21101NM) (OpenAirDocs)
- Registry engine: [Continental C90 series](https://openairdocs.org/engine/continental-c90-series) (registry code 17009, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 7EC-371
- Airframe hours: 2671
- Engines: CONTINENTAL C-90-12F 90 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Pro Aero, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, July 4, 1989, 77 hours before
- Airport: HAO, Hamilton-Fairfield, runway 29, 5,130 × 80 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 51; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 1,308 total, 8 in this make and model, 1,182 as pilot in command, 63 in the last 90 days, 18 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 280° at 10 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 61 °F, dew point 36 °F
- Altimeter: 30.00 inHg
- Observed at: DAY, 22 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 19900511016739A](https://openairdocs.org/incident/19900511016739A), May 11, 1990: Bbavia 7EC, Hamilton, OH, Substantial damage. Lost directional control on landing roll. Ran off runway struck an embankment and trees.

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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