# NTSB SEA99LA039: Cessna TU206G, N756AV, Cascade, ID, March 3, 1999

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 3, 1999, 12:25 local (19:25 UTC)
- Place: Cascade, ID
- Coordinates: 44.59045, -115.570388 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.5904&lon=-115.5704&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 22, 2000
- Report: Approved by Office Director
- NTSB case key (mKey): 45850
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA99LA039
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/45850/pdf
- Page: https://openairdocs.org/ntsb/SEA99LA039

## Probable cause

Unsuitable terrain for landing was selected.  Snow covered airstrip was a factor.

## Sequence of events

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

- Nose over, landing - roll
  - airport facilities,runway/landing area condition - snow covered (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)

## Analysis

The pilot reported that as he approached the snow covered airstrip, he noted that the snow cover appeared to be groomed (snowmobile packed) to its full length and hard packed.  The landing was normal and as the main landing gear touched down, the wheels settled slightly in the snow.  When the nose gear touched down, the wheel dug into the snow and the airplane nosed over.

## Factual narrative

On March 3, 1999, at 1225 mountain standard time, a Cessna TU206G, N756AV, registered to and operated by Arnold Aviation as a 14 CFR Part 135 on-demand air taxi, nosed over during the landing roll at a private airstrip located 40 miles northeast of Cascade, Idaho.  Visual meteorological conditions prevailed at the time and a company flight plan was used.  The aircraft was substantially damaged and the airline transport pilot, the sole occupant, was not injured.  The flight originated from another private airstrip in the area about five minutes prior to the accident.

In a written statement, the pilot reported that as he approached the airstrip, he noted that the runway was snow covered and "groomed (snowmobile packed) to its full length and appeared to be hard surfaced."  The pilot stated that the approach and landing were normal.  The main landing gear touched down and settled slightly in the snow, however, when the nose gear touched down, it dug into the snow.  The propeller contacted the snow and the airplane nosed over.

## Aircraft

- Registration: [N756AV](https://openairdocs.org/aircraft/N756AV), registered now, S/N U20603944, built 1977 (OpenAirDocs)
- Reported make and model: Cessna TU206G
- 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: U20603944
- Airframe hours: 9936
- Engines: Continental TSIO-520-M 310 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Arnold Aviation
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, December 3, 1998, 37 hours before
- Departed: 2U8, ID
- Flight plan: Company VFR
- Airport: Pistol Creek, runway 23, 2,500 × 30 ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 52; flight instructor, commercial, airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 16,875 total, 1,471 in this make and model, 13,321 as pilot in command, 50 in the last 90 days, 7 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 12 knots
- Visibility: 10 statute miles
- Temperature: 34 °F, dew point 16 °F
- Altimeter: 29.00 inHg
- Observed at: MYL, 42 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 19990303001959A](https://openairdocs.org/incident/19990303001959A), Mar 3, 1999: Cessna TU206G, Pistol Creek, ID, Substantial damage. Arnold aviation & tuhunder mountain express air taxi landed on soft snow, the nose wheel became stuck, and the acft flipped over, no injuries were reported to…

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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