# NTSB MIA91LA010: American AA-5, N5825L, Cape Coral, FL, October 14, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 14, 1990, 17:56 local (21:56 UTC)
- Place: Cape Coral, FL
- Coordinates: 26.550481, -82.020271 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=26.5505&lon=-82.0203&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 15, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 32784
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA91LA010
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32784/pdf
- Page: https://openairdocs.org/ntsb/MIA91LA010

## Probable cause

A PARTIAL LOSS OF ENGINE POWER, CAUSED BY MECHANICAL FAILURE OF THE NUMBER 3 CYLINDER ENGINE EXHAUST VALVE, FOR AN UNDETERMINED REASON.

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, cruise - normal
  - engine assembly,valve,exhaust - failure,total (cause)
- Forced landing, descent - emergency
- On ground/water collision with object, landing - roll
  - object - residence

## Analysis

THE PILOT DEPARTED PAGE FIELD, FORT MYERS, FLORIDA, ON A PERSONAL FLIGHT. VFR CONDITIONS PREVAILED AT THE TIME. NO FLIGHT PLAN WAS FILED. WHILE IN CRUISE FLIGHT, THE AIRPLANE EXPERIENCED A PARTIAL LOSS OF ENGINE POWER. THE PILOT MADE AN EMERGENCY LANDING TO AN OPEN FIELD. DURING LANDING ROLL, THE AIRPLANE EXPERIENCED AN ON GROUND COLLISION WITH A HOUSE. THE AIRPLANE SUSTAINED SUBSTANTIAL DAMAGE. THE PILOT AND ONE PASSENGER WERE NOT INJURED. TEAR DOWN ANALYSIS OF THE ENGINE REVEALED THE EXHAUST VALVE ON THE NUMBER THREE ENGINE CYLINDER HAD FAILED AT THE EXHAUST STEM FOR UNDETERMINED REASONS.

## Aircraft

- Registration: [N5825L](https://openairdocs.org/aircraft/N5825L), registered now, S/N AA5-0025, built 1972 (OpenAirDocs)
- Reported make and model: AMERICAN AA-5
- Registry model: [American AA-5](https://openairdocs.org/model/american-aa-5) (registry code 0631410) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 0025
- Airframe hours: 1689
- Engines: LYCOMING O-320-E2G 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Robert A. Stoner
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, September 8, 1990, 8 hours before
- Departed: FMY, FORT MYERS, FL

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; commercial, private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 286 total, 38 in this make and model, 229 as pilot in command, 22 in the last 90 days, 7 in the last 30 days

## Weather

- Conditions: Visual (VMC), Not reported
- Wind: 250° at 4 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 88 °F, dew point 64 °F
- Altimeter: 29.00 inHg
- Observed at: FMY, 10 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 19901014045029A](https://openairdocs.org/incident/19901014045029A), Oct 14, 1990: Gulstm AA5, Cape Coral, FL, Substantial damage. Engine vibration and lost power. Overshot field in residential area and struck a house. An exhaust valve had failed

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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