# NTSB ANC84LA130: Bellanca 8GCBC, N7662S, Aleknagik, AK, August 4, 1984

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: August 3, 1984, 20:45 local (Aug 4, 1984, 04:45 UTC)
- Place: Aleknagik, AK
- Coordinates: 59.240219, -158.619827 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=59.2402&lon=-158.6198&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4334
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC84LA130
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4334/pdf
- Page: https://openairdocs.org/ntsb/ANC84LA130

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - propeller system/accessories,spinner - disintegrated (cause)
- Forced landing, descent - emergency
- In flight collision with object, descent - emergency
  - object - tree(s)
  - distance - misjudged, pilot in command (contributing factor)

## Analysis

THE ACFT CRASHED INTO TREES SHORT OF A CLEARING DURING A FORCED LANDING FOLLOWING A PROP FAILURE. POST ACCIDENT ATTEMPTSTO IDENTIFY THE REASONS FOR THE FAILURE WERE CLOUDED BY THE IMPACT DAMAGE. THE ACFT WAS PLACARDED WARNING AGAINST CONTINUOUS HIGH RPM OPERATION TO AVOID FATIGUE FROM RESONANT VIBRATIONS.

## Aircraft

- Registration: [N7662S](https://openairdocs.org/deregistered/N7662S-1997-05-05), registration cancelled 1997-05-05, S/N 21576 (OpenAirDocs)
- Reported make and model: BELLANCA 8GCBC
- Registry model: [Bellanca 8GCBC](https://openairdocs.org/model/bellanca-8gcbc) (registry code 1220803) (OpenAirDocs)
- Category: Airplane
- Serial number: 215-76
- Airframe hours: 742
- Engines: LYCOMING O-360-C2E 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Paul Kenneth Prokopowich
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 21, 1984
- Departed: 5A8, ALEKNAGIK, AK
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: front; flight hours: 330 total, 115 in this make and model, 298 as pilot in command, 16 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 225° at 5 knots
- Visibility: 25 statute miles
- Lowest ceiling: 10,000 ft overcast
- Temperature: 70 °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 19840803038089A](https://openairdocs.org/incident/19840803038089A), Aug 3, 1984: Bbavia 8GCBC, Aleknagik, AK, Substantial damage. Prop spinner and backing plate separated from hub. Spinner screws mistorqueing failed backing plate bracket.

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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