# NTSB WPR12CA148: Stinson 108-1, N97032, Coolin, ID, March 25, 2012 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: March 25, 2012, 15:00 local (22:00 UTC) - Place: Coolin, ID - Coordinates: 48.520557, -116.822776 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=48.5206&lon=-116.8228&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report May 15, 2012 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: FAA - NTSB case key (mKey): 83235 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR12CA148 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/83235/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=83235 - Page: https://openairdocs.org/ntsb/WPR12CA148 ## Probable cause The pilot’s decision to land on a snow-covered runway. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Stinson 108-1, 2 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=9230404), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md) - [Runway/land/takeoff/taxi surface: snow/slush/ice covered surface](https://openairdocs.org/ntsb-findings/03023015): Environmental issues › Physical environment · Contributed to outcome; cases with it: [Stinson 108-1, 1 case](https://openairdocs.org/ntsb-findings/03023015/cases.md?model=9230404), [All aircraft, 219 cases](https://openairdocs.org/ntsb-findings/03023015/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096) (defining event); cases with it: [Stinson 108-1, 6 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=9230404), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The pilot stated that he did not call the destination airport for airport conditions. Upon arrival, he flew over the snow-covered runway to check the runway surface. He noted snowmobile tracks and patches of grass through the snow. After touching down, the airplane rolled for about 250 feet before the tires sunk into the snow. The airplane nosed over and came to rest on its back. The airplane’s right wing struts, vertical stabilizer, rudder and both wing tips were bent. ## Factual narrative The pilot stated that he flew over the snow covered runway and observed the windsock, which indicated zero wind. After touching down, the airplane rolled for about 250 feet before the airplane’s tires sunk into the snow. The airplane nosed over and came to rest on its back. The airplane’s right wing struts, vertical stabilizer, rudder and both wing tips were bent. ## Aircraft - Registration: [N97032](https://openairdocs.org/deregistered/N97032-2018-08-10), registration cancelled 2018-08-10, S/N 108-1032, built 1946 (OpenAirDocs) - Reported make and model: STINSON 108-1 - Registry model: [Stinson 108-1](https://openairdocs.org/model/stinson-108-1) (registry code 9230404) (OpenAirDocs) - Registry engine: [Franklin 6A4150 series](https://openairdocs.org/engine/franklin-6a4150-series) (registry code 27024, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 108-1032 - Engines: FRANKLIN 6A4150 SERIES 150 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Dallas W. Deardorff - Registered owner: Dallas W. Deardorff - Airworthiness certificate: Standard, Normal - Departed: GEG, Spokane, WA - Destination: 66S, Coolin, ID - Flight plan: Unknown - Airport: 66S, Cavanaugh Bay Airport, runway 33, 3,100 × 120 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 20; injuries: none; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; seat: left; flight hours: 100 total, 20 in this make and model, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 30° at 13 knots, gusting 20 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 55 °F, dew point 32 °F - Altimeter: 29.67 inHg - Observed at: SZT, 18 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 20120325003429A](https://openairdocs.org/incident/20120325003429A), Mar 25, 2012: Stinson 108-1, Coolin, ID, Substantial damage. Pilot landed on snow covered runway. Snow was wet with a frozen top crust and a depth between eight (8) to ten (10) inches at impact point. The aircraft roll… ## Docket (1 files) The files NTSB released with the investigation on April 19, 2012, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=83235. 280 KB in all. - Pilot Statement (item 1, .PDF, 280 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40366581&FileExtension=.PDF&FileName=Pilot%20Statement-Redacted.PDF 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.