# NTSB ANC86LA103: Cessna 170B, N3162B, Tekanika River, AK, July 7, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 6, 1986, 16:30 local (Jul 7, 1986, 00:30 UTC)
- Place: Tekanika River, AK
- Coordinates: 64.469482, -148.570526 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=64.4695&lon=-148.5705&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4697
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC86LA103
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4697/pdf
- Page: https://openairdocs.org/ntsb/ANC86LA103

## 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
  - engine assembly,push rod - failure,total (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll

## Analysis

THE ACFT NOSED OVER DURING THE FORCED LANDING WHICH FOLLOWED A TOTAL LOSS OF PWR. THE PLT REPORTED HE NOTED A DECREASE IN OIL PRESSURE DURING CRUISE FLT JUST PRIOR TO THE PWR LOSS. EXAMINATION OF THE ACFT ENG REVEALED THAT THE #6 CYLINDER PUSH ROD HAD FAILED.

## Aircraft

- Registration: [N3162B](https://openairdocs.org/aircraft/N3162B), registered now, S/N 25404, built 1952 (OpenAirDocs)
- Reported make and model: CESSNA 170B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 25404
- Airframe hours: 1886
- Engines: CONTINENTAL C-145 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Timbre Houlton
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 6, 1986, 50 hours before
- Destination: FAI, FAIRBANKS, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 20; private; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 435 total, 211 in this make and model, 399 as pilot in command, 122 in the last 90 days, 60 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 30° at 6 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 84 °F, dew point 25 °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 19860706030259A](https://openairdocs.org/incident/19860706030259A), Jul 6, 1986: Cessna 170B, Teklanika River, AK, Substantial damage. Nosed over during emergency landing. Oil pressure dropped and engine failed. Found broken connecting rod.

## Other investigations on N3162B (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 SEA69D0252](https://openairdocs.org/ntsb/SEA69D0252), Feb 3, 1969: Cessna 170B (N3162B), Mosby, MT, substantial damage

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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