# NTSB NYC90LA045: Aeronca 11CC, N4636E, Slippery Rock, PA, January 3, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: January 3, 1990, 14:30 local (19:30 UTC)
- Place: Slippery Rock, PA
- Coordinates: 41.070297, -80.060005 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.0703&lon=-80.0600&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 28, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 36594
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC90LA045
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/36594/pdf
- Page: https://openairdocs.org/ntsb/NYC90LA045

## Probable cause

LOSS OF AIRSPEED AND AN INADVERTENT STALL BY THE PILOT DURING AN ATTEMPTED RETURN TO THE AIRPORT, FOLLOWING A POWER LOSS DUE TO CARBURETOR ICE.

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, cruise - normal
  - single engine aircraft
  - weather condition - carburetor icing conditions (cause)
  - carburetor heat - improper use of, pilot in command (cause)
- Forced landing, descent - emergency
- Loss of control - in flight, descent - emergency
  - airspeed - not maintained, pilot in command
  - stall/mush - inadvertent, pilot in command

## Analysis

THE ENGINE EXPERIENCED A POWER LOSS DUE TO CARBURETOR ICE ABOUT 5 MINUTES AFTER TAKEOFF AT AN ALTITUDE OF 800 FEET AGL AND THE PILOT ATTEMPTED TO RETURN TO THE AIRPORT FOR A LANDING. REALIZING HE WOULD NOT MAKE THE AIRPORT, THE PILOT TURNED THE AIRPLANE 90 DEGREES TO THE RIGHT AND THE AIRPLANE STALLED AT 30 FEET AND STRUCK THE ROAD. ON IMPACT THE PILOT WAS THROWN OUT, HOWEVER HE WAS NOT INJURED. THE FAA EXAMINED THE AIRPLANE AND COULD FIND NO INDICATION OF A MECHANICAL FAILURE. THEY REPORTED THE TOP SPARK PLUGS WERE SOOTY AND THE FUEL TANKS CONTAINED AVIATION GASOLINE.

## Aircraft

- Registration: [N4636E](https://openairdocs.org/deregistered/N4636E-1990-10-17), registration cancelled 1990-10-17, S/N 11CC271 (OpenAirDocs)
- Reported make and model: AERONCA 11CC
- Registry model: [Aeronca 11CC](https://openairdocs.org/model/aeronca-11cc) (registry code 0191110) (OpenAirDocs)
- Category: Airplane
- Serial number: 11CC-271
- Engines: CONTINENTAL C-85-8 85 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: William J. Rayner
- Airport: OPN1, Flying Acres, runway 9, 2,100 × 200 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 64; private; airplane ratings: multi-engine land, single-engine land; medical: class 3, valid medical--no waivers/lim.; flight hours: 517 total, 35 in this make and model, 3 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 225° at 12 knots
- Visibility: 20 statute miles
- Lowest ceiling: 5,000 ft overcast
- Temperature: -0 °F, dew point -0 °F

## 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 19900103000059A](https://openairdocs.org/incident/19900103000059A), Jan 3, 1990: Bbavia 11CC, Slippery Rock, PA, Substantial damage. Engine lost power. Stalled and crashed on a road. Carburetor inlet strainer was missing. Dirt on needle valve.

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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