# NTSB CHI93LA197: Cessna 210L, N2267S, Indianola, IA, June 6, 1993

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 5, 1993, 21:45 local (Jun 6, 1993, 02:45 UTC)
- Place: Indianola, IA
- Coordinates: 41.359771, -93.56047 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.3598&lon=-93.5605&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report July 25, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 9217
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI93LA197
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/9217/pdf
- Page: https://openairdocs.org/ntsb/CHI93LA197

## Probable cause

A FATIGUE FRACTURE OF THE CRANKSHAFT.

## 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,crankshaft - fractured (contributing factor)
  - engine assembly,crankshaft - fatigue (cause)
- Forced landing, descent - emergency
  - emergency procedure - initiated, pilot in command
- Gear not extended, landing
  - gear extension - not used, pilot in command

## Analysis

WHILE IN NIGHT VFR CONDITIONS THE AIRPLANE  SUFFERED A TOTAL LOSS OF ENGINE POWER.   THE PILOT CONDUCTED A FORCED LANDING INTO  A FIELD WITH THE LANDING GEAR RETRACTED.   A POST ACCIDENT EXAMINATION REVEALED A  FRACTURED CRANKSHAFT. FURTHER LABORATORY  TESTS FAILED TO REVEAL THE CAUSE OF THE  FATIGUE FRACTURE.

## Factual narrative

On June 5, 1993, at 2145 central daylight time, a Cessna 210L, N2267S, registered to Steven R. Mowery of Clarinda, Iowa, and operated by a private rated pilot, experienced a loss of engine power while in cruise flight and performed a forced landing in a farm field near Indianola, Iowa.  The airplane sustained substantial damage, however the pilot and two passengers reported no injuries.  The personal 14 CFR Part 91 flight was operating in night VFR conditions.  No flight plan was on file.  The flight departed Marion, Iowa, at 2020, with the intended destination of Clarinda, Iowa.

A post accident examination of the engine revealed that the crankshaft had fractured.  Further laboratory examination was conducted by the NTSB Office of Research and Engineering.  Their report is an addendum to this report.  Their findings did not determine the initiating circumstances leading to the fatigue fracture of the crankshaft.

## Aircraft

- Registration: N2267S (not matched to a registry record)
- Reported make and model: CESSNA 210L
- Category: Airplane
- Serial number: 21061211
- Engines: CONTINENTAL IO-520-L 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Mowery, Steven R.
- Registered owner: Mowery, Steven R.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, May 31, 1993
- Departed: C17, MARION, IA
- Destination: ICL, CLARINDA, IA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; seat: left

## Weather

- Conditions: Visual (VMC), Night/dark
- Visibility: 20 statute miles
- Lowest ceiling: 9,500 ft overcast
- Temperature: 63 °F, dew point 54 °F
- Altimeter: 30.00 inHg
- Observed at: DSM, 20 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 19930605016949A](https://openairdocs.org/incident/19930605016949A), Jun 5, 1993: Cessna 210L, Indianola, IA, Substantial damage. Lost power en route. Landed at dark night with gear intentially retracted. Found broken crankshaft.

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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