# NTSB MKC87LA001: Aeronca 7AC, N84911, Tribune, KS, October 6, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 5, 1986, 19:00 local (Oct 6, 1986, 00:00 UTC)
- Place: Tribune, KS
- Coordinates: 38.470165, -101.74971 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.4702&lon=-101.7497&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 34309
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC87LA001
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34309/pdf
- Page: https://openairdocs.org/ntsb/MKC87LA001

## 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
  - weather condition - carburetor icing conditions (contributing factor)
  - carburetor heat - improper use of, pilot in command (cause)
  - fuel system,carburetor - ice (cause)
- Forced landing, descent - emergency
- In flight collision with object, landing - flare/touchdown
  - object - utility pole (contributing factor)

## Analysis

THE PIC RPTD ENG FAILURE WHILE IN CRUISE FLT. THE STUDENT PIC SUSPECTED CARB ICING AS THE CAUSE OF THE ENG FAILURE. NO MECHANICAL PBLM WAS DISCOVERED DURING THE ENG INSPECTION. THE ICING PROBABILITY CHARTS INDICATED THAT CARBURETOR ICING WAS LIKELY IN THE CRUISE PWR CONFIGURATION THE PIC WAS USING. NO FUEL CONTAMINATES OR OTHER DESCREPANCIES WERE DISCOVERED DURING THE FOLLOW-UP INSPECTION.

## Aircraft

- Registration: [N84911](https://openairdocs.org/aircraft/N84911), registered now, S/N 7AC-3630, built 1946 (OpenAirDocs)
- Reported make and model: AERONCA 7AC
- Registry model: [Aeronca 7AC](https://openairdocs.org/model/aeronca-7ac) (registry code 2110102) (OpenAirDocs)
- Registry engine: [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series) (registry code 17003, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 3630
- Airframe hours: 1950
- Engines: CONTINENTAL A-65 65 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: F.D. Simpson
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, September 5, 1986, 12 hours before
- Departed: 5K2, TRIBUNE, KS

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 18; student; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; flight hours: 52 total, 52 in this make and model, 24 as pilot in command, 7 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 80° at 6 knots
- Visibility: 15 statute miles
- Lowest ceiling: 25,000 ft broken
- Temperature: 66 °F, dew point 45 °F
- Altimeter: 30.00 inHg
- Observed at: GCK

## 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 19861005049759A](https://openairdocs.org/incident/19861005049759A), Oct 5, 1986: Bbavia 7AC, Tribune, KS, Substantial damage. The engine lost power due to carburetor ice. The aircraft struck a pile during the forced landing in a cornfield.

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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