# NTSB ANC89LA147: Cessna 175, N6929E, Anchorage, AK, August 21, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 20, 1989, 20:25 local (Aug 21, 1989, 04:25 UTC)
- Place: Anchorage, AK
- Location: 61.2181° N, 149.9003° W: Placed by OpenAirDocs: center of Anchorage, AK, within about 23 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=61.2181&lon=-149.9003&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 23, 1992
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5244
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC89LA147
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5244/pdf
- Page: https://openairdocs.org/ntsb/ANC89LA147

## Probable cause

FAILURE OF THE ACCESSORY DRIVE (CRANKSHAFT) DOWEL PIN AND/OR GEAR BOLT, WHICH RESULTED IN THE ACCESSORY DRIVEGEAR BECOMING DISCONNECTED FROM THE CRANKSHAFT.

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, cruise - normal
  - accessory drive assy,drive gear - disconnected (cause)
- Forced landing, descent - emergency
- On ground/water collision with object, landing - flare/touchdown
  - object - tree(s) (contributing factor)

## Aircraft

- Registration: N6929E (not matched to a registry record)
- Reported make and model: CESSNA 175
- Category: Airplane
- Serial number: 56429
- Airframe hours: 1952
- Engines: LYCOMING O-360-A1A 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Devincenzi, Roy A.
- Registered owner: Devincenzi, Roy A.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 1, 1989, 16 hours before
- Departed: SXQ, SOLDOTNA, AK
- Destination: MRI, ANCHORAGE, AK
- Airport: NONE

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; private; airplane ratings: single-engine sea, single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 450 total, 300 in this make and model, 400 as pilot in command, 15 in the last 90 days, 6 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 10 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 55 °F
- Altimeter: 29.00 inHg

## 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 19890820033729A](https://openairdocs.org/incident/19890820033729A), Aug 20, 1989: Cessna STC175, Anchorage, AK, Substantial damage. Engine quit,overshot landing on dirt strip. Pulled up and stalled into trees. Crankshaft gear bolt and pin failed.

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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