# NTSB ANC92LA113: Cessna 175, N9304B, Wasilla, AK, July 28, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 28, 1992, 10:30 local (18:30 UTC)
- Place: Wasilla, AK
- Location: 61.5785° N, 149.4763° W: Placed by OpenAirDocs: center of Wasilla, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=61.5785&lon=-149.4763&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report May 26, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5761
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC92LA113
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5761/pdf
- Page: https://openairdocs.org/ntsb/ANC92LA113

## Probable cause

FAILURE OF THE ENGINE CRANKSHAFT DUE TO AN OIL PASSAGE HOLE BEING BLOCKED. CONTRIBUTING TO THE ACCIDENT WAS THE UNSUITABLE TERRAIN.

## 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
  - engine assembly,crankshaft - failure,total (cause)
  - lubricating system,oil port/passage,internal - blocked(total) (cause)
- Forced landing, descent - emergency
  - powerplant - failure,total
- On ground/water collision with object, landing - roll
  - terrain condition - none suitable (contributing factor)

## Analysis

THE PILOT STATED THAT WHILE IN CRUISE FLIGHT HE HEARD 3 LOUD BANGS FROM THE ENGINE, THEN IT SEIZED.  DISASSEMBLY OF THE ENGINE FOUND THE SLUDGE PLUG DISLODGED, AND THE CRANKSHAFT BROKEN AT THE NO. 3 ROD JOURNAL.

## Aircraft

- Registration: [N9304B](https://openairdocs.org/deregistered/N9304B-2013-05-22), registration cancelled 2013-05-22, S/N 55-104, built 1958 (OpenAirDocs)
- Reported make and model: CESSNA 175
- Registry model: [Cessna 175](https://openairdocs.org/model/cessna-175) (registry code 2072502) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 55-104
- Airframe hours: 3378
- Engines: LYCOMING O-360-A1D 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Dennis L. Hall
- Registered owner: Dennis L. Hall
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 11, 1992, 28 hours before
- Departed: MRI, ANCHORAGE, AK
- Destination: MRI, ANCHORAGE, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 47; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 680 total, 35 in this make and model, 651 as pilot in command, 36 in the last 90 days, 7 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 40 statute miles
- Lowest ceiling: 6,500 ft broken
- Temperature: 57 °F, dew point 54 °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 19920728027949A](https://openairdocs.org/incident/19920728027949A), Jul 28, 1992: Cessna 175, Wasilla, AK, Substantial damage. Engine seized. On landing struck telephone pole. Crankshaft broke. Caused by sludge plug dislodged blocked oil flow.

## Other investigations on N9304B (1)

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.

- [NTSB FTW95LA315](https://openairdocs.org/ntsb/FTW95LA315), Jul 24, 1995: Cessna 175 (N9304B), Silvercliff, CO, substantial damage. Probable cause: FAILURE BY THE PILOT TO FUEL THE AIRCRAFT WHICH RESULTED IN FUEL EXHAUSTION. A FACTOR WAS UNSUITABLE TERRAIN FOR A FORCED 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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