# NTSB MKC84FA034: Cessna 21ON, N5209C, Wentzville, MO, December 6, 1983

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Field investigation · Final report
- Date: December 6, 1983, 11:25 local (17:25 UTC)
- Place: Wentzville, MO
- Coordinates: 38.809116, -90.850349 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.8091&lon=-90.8503&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 2 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 33506
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC84FA034
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33506/pdf
- Page: https://openairdocs.org/ntsb/MKC84FA034

## 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
  - engine assembly,connecting rod - failure,total (cause)
  - engine assembly,connecting rod - overtemperature (cause)
  - engine assembly,connecting rod - fatigue (cause)
- Forced landing, landing - flare/touchdown
- Gear collapsed, landing - flare/touchdown
  - gear extension - delayed, pilot in command (cause)
  - gear down and locked - not obtained, pilot in command (cause)

## Analysis

THE ACFT WAS LANDED WITH THE LANDING GEAR PARTIALLY EXTENDED DURING A FORCED LANDING AFTER AN ENGINE FAILURE. THE PLT DELAYED THE EXTENSION OF THE GEAR BECAUSE OF THE CONDITION OF THE LANDING AREA.  EXAMINATION OF THE ENGINE SHOWED A FAILURE OF THE #2 CONNECTING ROD BEARING STRAP DUE TO FATIGUE. THIS FAILURE WAS FOLLOWED BY FAILURE OF THE REMAINING RODS.

## Aircraft

- Registration: [N5209C](https://openairdocs.org/aircraft/N5209C), registered now, S/N 21063716, built 1979 (OpenAirDocs)
- Reported make and model: CESSNA 21ON
- Registry model: [Cessna 210N](https://openairdocs.org/model/cessna-210n) (registry code 2073453) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 21063716
- Airframe hours: 1879
- Engines: CONTINENTAL IO-520-L 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Registered owner: National Family Institute,Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 10, 1983, 78 hours before
- Departed: OJC, OLATHE, KS
- Destination: 3SQ, ST. CHARLES, MO
- Flight plan: IFR
- Airport: MO50, Wentzville

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land, single-engine sea; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 1,000 total, 131 in this make and model, 951 as pilot in command, 162 in the last 90 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 290° at 12 knots, gusting 24
- Visibility: 3 statute miles
- Lowest ceiling: 1,100 ft broken
- Temperature: 28 °F
- Altimeter: 29.00 inHg

## 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 19831206060229A](https://openairdocs.org/incident/19831206060229A), Dec 6, 1983: Cessna 210N, Wentzville, MO, Substantial damage. Crash occurred during emergency land after engine failure. Nr 2 rod was broken through the rod bearing strap.

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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