# NTSB CHI88LA209: Cessna 172RG, N9769B, Mt. Vernon, OH, August 14, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 14, 1988, 18:30 local (22:30 UTC)
- Place: Mt. Vernon, OH
- Coordinates: 40.390411, -82.469871 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.3904&lon=-82.4699&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 7, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 14143
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI88LA209
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14143/pdf
- Page: https://openairdocs.org/ntsb/CHI88LA209

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, cruise - normal
  - lubricating system,oil hose - chafed (cause)
  - fluid,oil - exhaustion (cause)
  - engine assembly,connecting rod - failure,total
  - powerplant - seized
- Forced landing, descent - emergency
- Hard landing, landing - flare/touchdown
  - terrain condition - crop

## Analysis

WHILE IN CRUISE FLIGHT IN VFR CONDITIONS AND ON AN IFR FLIGHT PLAN, THE PILOT EXPERIENCED A TOTAL LOSS OF ENGINE POWER. THE PILOT EXECUTED A FORCED LANDING IN A SOY BEAN FIELD AFTER AN UNSUCCESSFUL RESTART ATTEMPT. EXAMINATION OF THE OIL COOLER HOSE REVEALED A HOLE CHAFED THROUGH IT AT THE POINT WHERE IT WAS ROUTED UNDER THE CABIN HEAT AIR DUCT HOSE; THIS HOLE ALLOWED THE OIL TO VENT OVERBOARD. THE ENGINE SEIZED DUE TO OIL EXHAUSTION.

## Aircraft

- Registration: [N9769B](https://openairdocs.org/deregistered/N9769B-2011-10-21), registration cancelled 2011-10-21, S/N 172RG1023, built 1981 (OpenAirDocs)
- Reported make and model: CESSNA 172RG
- Registry model: [Cessna 172RG](https://openairdocs.org/model/cessna-172rg) (registry code 2072438) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 172RG1023
- Airframe hours: 2474
- Engines: LYCOMING O-360-F1A6 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Fairfield Aviation, Inc.
- Registered owner: Fairfield Aviation, Inc
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, June 3, 1988, 101 hours before
- Departed: AKR, AKRON, OH
- Destination: I15, LANCASTER, OH
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 47; commercial, flight instructor, military; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 7,214 total, 128 in this make and model, 3,745 as pilot in command, 29 in the last 90 days, 10 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 91 °F, dew point 70 °F
- Altimeter: 30.00 inHg
- Observed at: CMH, 26 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 19880814033009A](https://openairdocs.org/incident/19880814033009A), Aug 14, 1988: Cessna 172RG, Mt Vernon, OH, Substantial damage. Lost oil pressure and engine seized. Crash landed in field. Oil cooler hose chafed through by cabin heat hose.

## Other investigations on N9769B (1)

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.

- [NTSB MIA98LA146](https://openairdocs.org/ntsb/MIA98LA146), Apr 26, 1998: Cessna 172RG (N9769B), Greenville, SC, substantial damage. Probable cause: The pilot's use of full flaps while landing in a strong crosswind resulting in loss of directional control during the landing roll.

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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