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Atlas / NTSB / WPR22LA139

NTSB CAROL · Event

Event WPR22LA139

2022-03-30 Swan Valley, Idaho, United States Airport · PVT None 1 aircraft Status: Completed

Registry · N35AH

FAA Aircraft Registry record.

Make / Model

AVIAT AIRCRAFT INC A-1B

Year of manufacture

2007 · 15 years old at event

Engine

LYCOMING IO-360-A1D6 (200 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

20070717

ADS-B equipped

Yes — Mode-S A3E27C

Registrant of record

K9 AIR LLC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot’s failure to maintain airplane control during the landing roll on a snow-covered runway surface.

Factual narrative

The pilot reported that, during a landing on a snow-covered, private grass airstrip, he did not adequately confirm the landing surface condition. Subsequently, as the airplane slowed down during the landing roll, the landing gear penetrated through a shallow layer of hard packed snow and then dug into several inches of snow, which caused the airplane to nose over. The airplane sustained substantial damage to the right wing. The pilot reported no preaccident malfunctions or failures with the airplane that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • Personnel issues-Action/decision-Info processing/decision-Identification/recognition-Pilot
  • Environmental issues-Physical environment-Runway/land/takeoff/taxi surface-Snow/slush/ice covered surface-Effect on equipment
  • Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot

Verbatim from NTSB's published report. Source file NTSB_2022_WPR22LA139.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.