# NTSB ANC84LA147: Cessna 207A, N7325U, Sleetmute, AK, August 28, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 28, 1984, 10:15 local (18:15 UTC)
- Place: Sleetmute, AK
- Coordinates: 61.679561, -157.159103 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.6796&lon=-157.1591&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 office: Alaska Regional Office
- NTSB case key (mKey): 4346
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC84LA147
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4346/pdf
- Page: https://openairdocs.org/ntsb/ANC84LA147

## 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)
  - emergency procedure - performed, pilot in command
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - rough/uneven

## Analysis

WHILE CRUISING AT 1100 FT AGL THE ENG FAILED WITHOUT WARNING. EFFORTS TO RESTART WERE UNSUCCESSFUL. A FORCED LANDING WAS MADE INTO WOODED TERRAIN AND THE ACFT NOSED OVER DURING THE ROLL. ENG EXAM REVEALED THAT THE CRANKSHAFT WAS BROKEN THROUGH THE CRANK CHEEK JUST FORWARD OF THE #2 CONNECTING ROD JOURNAL. THERE WAS NO INDICATION OF ANY OVERHEATINGOR OPERATION WITHOUT LUBRICATION.

## Aircraft

- Registration: [N7325U](https://openairdocs.org/deregistered/N7325U-2013-05-07), registration cancelled 2013-05-07, S/N 20700398, built 1977 (OpenAirDocs)
- Reported make and model: CESSNA 207A
- Registry model: [Cessna 207A](https://openairdocs.org/model/cessna-207a) (registry code 2073604) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 20700398
- Airframe hours: 5365
- Engines: CONTINENTAL IO-520-F-11 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Registered owner: Harolds Air Service, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, July 3, 1984, 46 hours before
- Departed: SLQ, SLEETMUTE, AK
- Destination: ANI, ANIAK, AK
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 2,576 total, 1,850 in this make and model, 2,398 as pilot in command, 88 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 1 knots
- Visibility: 30 statute miles
- Lowest ceiling: 5,000 ft broken
- Temperature: 45 °F, dew point 28 °F
- Altimeter: 29.00 inHg
- Observed at: ANI, 40 nm away

## 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 19840828047309A](https://openairdocs.org/incident/19840828047309A), Aug 28, 1984: Cessna 207A, Sleetmute, AK, Substantial damage. Crankshaft of teledyne Continental remanufactured engine failed. Nosed over landing on muskeg.

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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