# NTSB MIA90LA133: Cessna 210A, N6697X, Palm Harbor, FL, May 25, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 25, 1990, 15:05 local (19:05 UTC)
- Place: Palm Harbor, FL
- Coordinates: 28.009233, -82.139495 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=28.0092&lon=-82.1395&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report September 29, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 32665
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA90LA133
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32665/pdf
- Page: https://openairdocs.org/ntsb/MIA90LA133

## Probable cause

THE IMPROPER LEANING OF THE FUEL/AIR MIXTURE RESULTING IN THE LOSS OF ENGINE POWER DUE TO EXCESSIVE INTERNAL ENGINE TEMPERATURE.

## Sequence of events

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

- Loss of engine power, cruise - normal
  - mixture - improper use of, pilot in command (cause)
  - powerplant - overtemperature
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - ground

## Analysis

ACCORDING TO THE PLT, THE FLT DEPARTED AFTER A NORMAL ENG RUN-UP WITH COWL FLAPS OPEN. DURING NORMAL CRUISE FLT, HE LEANED THE MIXTURE TO 50 DEGS RICH OF PEAK, BUT WHILE RETURNING TO LAND, HE OBSERVED THE EGT GAUGE INDICATE PAST THE MAXIMUM RED LINE LIMIT. HE FURTHER STATED THAT THE ENG BEGAN 'FALTERING.'  HE PUSHED THE MIXTURE TO FULL RICH, REPOSITIONED THE FUEL SELECTOR, TURNED THE ELECTRIC BOOST PUMP SWITCH TO HIGH, AND REPOSITIONED THE MAG SWITCH FROM BOTH TO LEFT, RIGHT, THEN BACK TO BOTH WITH NEGATIVE RESULTS. AFTER TOUCHDOWN IN A FIELD DURING THE FORCED LANDING, THE ACFT WAS SUBSTANTIALLY DAMAGED. THE ENG OPERATED NORMALLY DURING THE POST-ACCIDENT ENG RUN. EACH MAGNETO WAS CORRECTLY TIMED. THE POSITION OF THE COWL FLAPS AT THE TIME OF DEPARTURE & PRIOR TO THE ENG FAILURE COULD NOT BE VERIFIED.

## Aircraft

- Registration: [N6697X](https://openairdocs.org/deregistered/N6697X-2012-09-27), registration cancelled 2012-09-27, S/N 21057697, built 1961 (OpenAirDocs)
- Reported make and model: CESSNA 210A
- Registry model: [Cessna 210A](https://openairdocs.org/model/cessna-210a) (registry code 2073408) (OpenAirDocs)
- Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 21057697
- Engines: CONTINENTAL IO-470-E 260 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Heinz, Charles D.
- Registered owner: Dusek, John A
- Departed: PIE, ST PETERSBURG, FL

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 34; private; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; flight hours: 2,200 total, 100 in this make and model, 1,900 as pilot in command, 15 in the last 90 days, 5 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 80° at 10 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °F
- Observed at: PIE, 15 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 19900525017649A](https://openairdocs.org/incident/19900525017649A), May 25, 1990: Cessna 210A, Palm Harbor, FL, Substantial damage. Engine quit from too lean mixture. Unable restart. Crashed on landing.

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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