# NTSB SEA85LA073: Cessna 172, N8553X, Soda Springs, ID, March 12, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 12, 1985, 12:15 local (20:15 UTC)
- Place: Soda Springs, ID
- Coordinates: 42.750404, -111.530792 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.7504&lon=-111.5308&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40127
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA85LA073
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40127/pdf
- Page: https://openairdocs.org/ntsb/SEA85LA073

## Sequence of events

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

- Overrun, landing - roll
  - pitot/static system - ice (contributing factor)
  - airspeed - excessive, pilot in command (cause)
- Nose over, landing - roll
  - terrain condition - snow covered (contributing factor)

## Analysis

THE PLT MADE A PRECAUTIONARY LANDING DUE TO AN ICED UP PITOT TUBE. THE PLT LANDED WITH EXCESS SPEED AND WAS UNABLE TO STOP THE ACFT BEFORE IT OVERRAN THE END OF THE RWY. IT STRUCK A SNOW BANK AND THEN FLIPPED INVERTED.

## Aircraft

- Registration: [N8553X](https://openairdocs.org/deregistered/N8553X-2013-10-21), registration cancelled 2013-10-21, S/N P17257153, built 1962 (OpenAirDocs)
- Reported make and model: CESSNA 172
- Registry model: [Cessna P172D](https://openairdocs.org/model/cessna-p172d) (registry code 2072202) (OpenAirDocs)
- Registry engine: [Continental GO-300 series](https://openairdocs.org/engine/continental-go-300-series) (registry code 17024, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17257153
- Airframe hours: 1000
- Engines: LYCOMING O-320-E2D 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Barton Hyde
- Airworthiness certificate: Standard, Utility; Standard, Normal
- Departed: AFO, AFTON, WY
- Destination: LOL, LOVELOCK, NV
- Airport: U78, Soda Springs Muncipal, runway 16, 3,500 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 57; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 305 total, 52 in the last 90 days, 14 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 2 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 30 °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 19850312006549A](https://openairdocs.org/incident/19850312006549A), Mar 12, 1985: Cessna P172D, Soda Springs, ID, Substantial damage. Took off, noted no airspeed indiction. Landed, overshot runway, hit snow bank, flipped over. Pitot tube iced up.

## Other investigations on N8553X (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 LAX77OA008](https://openairdocs.org/ntsb/LAX77OA008), Jun 9, 1977: Cessna 172D (N8553X), Hermisillo, Mexico, 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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