# NTSB ANC90FA052: Aeronca 11AC, N86060, Chugiak, AK, April 8, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: April 8, 1990, 11:00 local (19:00 UTC)
- Place: Chugiak, AK
- Coordinates: 61.409709, -149.170227 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.4097&lon=-149.1702&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 5, 1991
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5290
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC90FA052
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5290/pdf
- Page: https://openairdocs.org/ntsb/ANC90FA052

## Probable cause

FAILURE OF THE PILOT TO MAINTAIN DIRECTIONAL CONTROL, WHICH RESULTED IN AN INADVERTENT GROUND SWERVE. FACTORS RELATED TO THE ACCIDENT WERE:  THE CROSSWIND AND SNOW COVERED TERRAIN BESIDE THE RUNWAY.

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - weather condition - crosswind (contributing factor)
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - inadvertent, pilot in command (cause)
- Dragged wing,rotor,pod,float or tail/skid, landing
- Nose down, landing
  - terrain condition - snow covered (contributing factor)

## Analysis

ACCORDING TO WITNESSES, THE PLT LOST DIRECTIONAL CONTROL OF THE ACFT DURING A LANDING ON RWY 19.  SUBSEQUENTLY, THE ACFT SWERVED ONTO SNOW COVERED TERRAIN BESIDE THE RWY & CAME TO REST ON ITS NOSE WITH DAMAGE TO THE RIGHT WING. THE WIND WAS RPRTD TO BE FROM 270 DEG AT 8 KTS.

## Aircraft

- Registration: [N86060](https://openairdocs.org/aircraft/N86060), registered now, S/N 11AC-481, built 1946 (OpenAirDocs)
- Reported make and model: AERONCA 11AC
- Registry model: [Aeronca 11AC](https://openairdocs.org/model/aeronca-11ac) (registry code 0191102) (OpenAirDocs)
- Registry engine: [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series) (registry code 17003, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 11AC-481
- Airframe hours: 2460
- Engines: CONTINENTAL A-75 75 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Kenneth L. Thorall
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, November 17, 1989, 10 hours before
- Departed: Z15
- Airport: Z15, Birchwood, runway 19, 4,010 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; private; airplane ratings: single-engine land, single-engine sea; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 2,300 total, 100 in this make and model, 2,200 as pilot in command, 20 in the last 90 days, 10 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 8 knots
- Visibility: 90 statute miles
- Lowest ceiling: none
- Temperature: 45 °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 19900408007649A](https://openairdocs.org/incident/19900408007649A), Apr 8, 1990: Bbavia 11AC, Birchwood, AK, Substantial damage. Lost control and ground looped 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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