# NTSB ANC06CA050: Cessna 170B, N2396D, Chickaloon, AK, May 7, 2006

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: May 7, 2006, 11:00 local (19:00 UTC)
- Place: Chickaloon, AK
- Coordinates: 61.811943, -147.506942
- Nearby events: https://openairdocs.org/map.md?lat=61.8119&lon=-147.5069&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 3, 2006
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 63598
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC06CA050
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/63598/pdf
- Page: https://openairdocs.org/ntsb/ANC06CA050

## Probable cause

The pilot's selection of unsuitable terrain for landing, which resulted in a nose over during the landing roll.  A factor associated with the accident was the snow on the runway.

## Sequence of events

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

- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - snow covered (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
- Nose over, landing - roll

## Analysis

The pilot was conducting a personal cross-country flight under Title 14, CFR Part 91, when he elected to land en route at an airport where he'd landed previously.  He said he flew over the landing area, and believed the snow on the runway was not significantly deep due to the lack of snow surrounding the runway.  He said nearing the end of the landing roll, the airplane's main landing gear wheels broke through the surface crust of snow, and the airplane nosed over.  In a written statement to the NTSB dated May 19, he reported that the airplane received damage to the vertical tail and wingtip.  He further reported that the snow was 6 inches deep, and was "the root of the problem."

## Factual narrative

The pilot was conducting a personal cross-country flight under Title 14, CFR Part 91, when he elected to land en route at an airport where he'd landed previously.  He said he flew over the landing area, and believed the snow on the runway was not significantly deep due to the lack of snow surrounding the runway.  He said nearing the end of the landing roll, the airplane's main landing gear wheels broke through the surface crust of snow, and the airplane nosed over.  In a written statement to the NTSB dated May 19, he reported that the airplane received damage to the vertical tail and wingtip.  He further reported that the snow was 6 inches deep, and was "the root of the problem."

## Aircraft

- Registration: [N2396D](https://openairdocs.org/aircraft/N2396D), registered now, S/N 20548 (OpenAirDocs)
- Reported make and model: Cessna 170B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Registry engine: [Continental 0-300 series](https://openairdocs.org/engine/continental-0-300-series) (registry code 17022, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 20548
- Airframe hours: 3683
- Engines: Continental O-300D 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Mark Svabik
- Registered owner: Mark Svabik
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 1, 2005, 9 hours before
- Departed: MRI, Anchorage, AK
- Destination: 15Z, McCarthy, AK
- Flight plan: VFR
- Airport: PASP, Sheep Mountain, runway 05, 2,270 × 60 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 48; injuries: none; private; airplane ratings: single-engine land; medical: class 3; last flight review June 1, 2005; seat: left; flight hours: 210 total, 54 in this make and model, 9 in the last 90 days, 7 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 39 °F
- Altimeter: 29.39 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 20060507010409A](https://openairdocs.org/incident/20060507010409A), May 7, 2006: Cessna 170B, Sheep Mountain, AK, Substantial damage. (-23) On may 7, 2006 at approximately 1030 local time, a wheel equipped CE-170-B, N2396D, attempted to land at Sheep Mountain, pasp. Shortly after touchdown…

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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