# NTSB SEA91LA083: Aeronca 11AC, N85948, Port Orchard, WA, April 12, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 12, 1991, 13:30 local (20:30 UTC)
- Place: Port Orchard, WA
- Coordinates: 46.529968, -122.140296 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.5300&lon=-122.1403&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 5, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41410
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA083
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41410/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA083

## Probable cause

THE LOSS OF ENGINE POWER DUE TO CONTAMINATED FUEL SYSTEM.

## 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
  - fluid,fuel - contamination (cause)
- In flight collision with terrain/water, descent - emergency
- In flight collision with terrain/water, landing - flare/touchdown

## Analysis

THE ACFT ENGINE QUIT A 2200 FT MSL IN CRUISE FLT.  THE PILOT INITITED A FORCED LANDING AND THE ACFT IMPACTED OBSTACLES ON THE GROUND.  EXAMINATION OF THE WRECKAGE REVEALED CONTAMINATION OF THE ACFT FUEL SYSTEM.

## Aircraft

- Registration: [N85948](https://openairdocs.org/aircraft/N85948), registered now, S/N 11AC-360, built 1953 (OpenAirDocs)
- Reported make and model: AERONCA 11AC
- Registry model: [Aeronca 11AC](https://openairdocs.org/model/aeronca-11ac) (registry code 0191102) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Airplane
- Serial number: 360
- Engines: CONTINENTAL A65-8F 65 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: John D. Gracie
- Registered owner: John D. Gracie
- Airworthiness certificate: Standard, Utility
- Departed: S50, AUBURN, WA
- Destination: PWT, BREMERTON, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 448 total, 60 in this make and model, 321 as pilot in command, 8 in the last 90 days, 7 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 340° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 63 °F, dew point 36 °F
- Altimeter: 30.00 inHg
- Observed at: PWT, 5 nm away

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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