# NTSB ANC87LA162: Cessna 206G, N756TT, 100mi S.Kng Slm, AK, September 19, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 19, 1987, 10:40 local (18:40 UTC)
- Place: 100mi S.Kng Slm, AK
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report October 6, 1988
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4924
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC87LA162
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4924/pdf
- Page: https://openairdocs.org/ntsb/ANC87LA162

## 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,bearing - burned (cause)
  - engine assembly,bearing - deteriorated (cause)
  - fluid,oil - starvation (cause)
- Forced landing, descent - emergency
- Undershoot, landing
  - distance - misjudged, pilot in command (contributing factor)
- Nose over, landing - flare/touchdown
  - terrain condition - rough/uneven

## Analysis

THE AIRCRAFT EXPERIENCED AN ENGINE POWER LOSS WHILE IN CRUISE FLIGHT AND SUBSEQUENTLY UNDERSHOT A LAKE DURING THE EMERGENCY LANDING. EXAMINATION OF THE ENGINE REVEALED THE NUMBER 2 BEARING WAS FOUND COMPLETELY DISINTEGRATED AND MISSING FROM ITS SEAT. EVIDENCE OF HIGH TEMPERATURE AND LACK OF OIL LUBRICATION.

## Aircraft

- Registration: [N756TT](https://openairdocs.org/deregistered/N756TT-2017-04-13), registration cancelled 2017-04-13, S/N U20604350, built 1978 (OpenAirDocs)
- Reported make and model: CESSNA 206G
- Registry model: [Cessna TU206G](https://openairdocs.org/model/cessna-tu206g) (registry code 2073357) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: U20604350
- Airframe hours: 2435
- Engines: CONTINENTAL IO-520-F 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Sea Hawk Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, February 18, 1987, 46 hours before
- Departed: 9Z3, KODIAK, AK
- Destination: PTH, PORT HEIDEN, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 59; commercial, airline transport, flight instructor; airplane ratings: multi-engine land, single-engine land, single-engine sea, multi-engine sea; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 13,535 total, 3,750 in this make and model, 13,410 as pilot in command, 325 in the last 90 days, 120 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 30 statute miles
- Lowest ceiling: 1,500 ft overcast
- Temperature: 50 °F, dew point 41 °F
- Altimeter: 30.00 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 19870919053659A](https://openairdocs.org/incident/19870919053659A), Sep 19, 1987: Cessna TU206G, King Salmon, AK, Substantial damage. Engine quit. Attempted to glide to a lake. Landed short. Airplane nosed over on landing. Main bearing disintegrated

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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