# NTSB ANC93LA009: Cessna 206, N9138M, Slate Creek, AK, October 23, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 23, 1992, 11:30 local (19:30 UTC)
- Place: Slate Creek, AK
- Coordinates: 63.699493, -144.889404 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=63.6995&lon=-144.8894&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 30, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5848
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC93LA009
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5848/pdf
- Page: https://openairdocs.org/ntsb/ANC93LA009

## Probable cause

THE ICY CONDITION OF THE RUNWAY AND THE DISCONTINUED SNOW REMOVAL.

## Sequence of events

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

- On ground/water collision with object, landing - roll
  - airport facilities,runway/landing area condition - icy (cause)
  - airport snow removal - discontinued, other maintenance personnel (cause)
  - airport facilities,runway/landing area condition - uphill (contributing factor)

## Analysis

THE AIRSTRIP WAS PLOWED TO 2/3 OF ITS WIDTH FOR ITS ENTIRE 1000 FOOT LENGTH.  THE PILOT STATED THAT A PICKUP TRUCK WAS PARKED ON THE FAR END OF THE RUNWAY, ON THE RUNWAY.  HE REPORTED THE BRAKING ACTION AS NIL AND WAS UNABLE TO STOP PRIOR TO REACHING THE PICKUP TRUCK.  HE ATTEMPTED TO COMPLETE THE LANDING ROLL OUT BETWEEN THE PICKUP TRUCK AND THE SNOWBANK. THE AIRPLANE'S RIGHT WING STRUCK THE PICKUP TRUCK AND THE LEFT HORIZONTAL STABILIZER STRUCK THE SNOWBANK.  THE PILOT WAS LANDING UPHILL BECAUSE THE AIRSTRIP IS CONSIDERED TO BE ONE WAY IN AND ONE WAY OUT.

## Aircraft

- Registration: [N9138M](https://openairdocs.org/deregistered/N9138M-2006-09-28), registration cancelled 2006-09-28, S/N U20601538, built 1970 (OpenAirDocs)
- Reported make and model: CESSNA 206
- Registry model: [Cessna U206E](https://openairdocs.org/model/cessna-u206e) (registry code 2073350) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: U20601538
- Engines: CONTINENTAL IO-520-F 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Thoreson, Oscar B.
- Registered owner: Thoreson, Oscar B.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 20, 1992, 138 hours before
- Departed: GKN, GULKANA, AK
- Flight plan: VFR
- Airport: Slate Creek, runway 28, 1,000 × 80 ft, ice

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 60; commercial, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 9,500 total, 500 in this make and model, 9,500 as pilot in command, 138 in the last 90 days, 70 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 90° at 3 knots
- Visibility: 3 statute miles
- Lowest ceiling: 1,000 ft overcast
- Temperature: 19 °F

## 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 19921023043259A](https://openairdocs.org/incident/19921023043259A), Oct 23, 1992: Cessna U206E, Slate Creek, AK, Substantial damage. Unable to go around or stop on icy runway. Slid off end into a truck and snowbank.

## Other investigations on N9138M (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 ANC05LA125](https://openairdocs.org/ntsb/ANC05LA125), Aug 21, 2005: Cessna U206E (N9138M), Skwentna, AK, substantial damage. Probable cause: The pilot's misjudged distance/altitude on final approach, which resulted in a noseover following an undershoot and in-flight collision with rough/uneven terrain. A factor associated with the…

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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