# Accident 20190717011989A: Aviat Aircraft Inc A-1A, Ennis, MT, July 17, 2019

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 17, 2019, 08:28 local time
- Place: Ennis, MT
- Airport: Ennis - Big Sky
- Damage: Substantial damage
- Phase of flight: Other, Specify
- Operating rules: Air taxi and commuter (Part 135)
- Operator: 5NWA
- Location: 45.3441° N, 111.7274° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=45.3441&lon=-111.7274&mi=10
- Aircraft: N137C, a cancelled registration (https://openairdocs.org/deregistered/N137C-2019-11-04) (OpenAirDocs)
- Registry model: Aviat A-1A (registry code 2210405, https://openairdocs.org/model/aviat-a-1a) (OpenAirDocs)
- Registry engine: Lycoming O&VO-360 series (registry code 41514, https://openairdocs.org/engine/lycoming-o-vo-360-series) (OpenAirDocs)
- Reported make and model: AVIAT AIRCRAFT INC A-1A
- Reported engine: LYCOMING O&VO-360 SER
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 1
- Pilot certificates: Airline transport, flight instructor
- Pilot flight hours: 18,000 total, 400 in this make and model, 120 in the last 90 days
- NTSB investigation: [NTSB GAA19CA432](https://openairdocs.org/ntsb/GAA19CA432) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20190717011989A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ON JULY 17, 2019, AT 0952 LOCAL TIME, AN AVIAT AIRCRAFT INC., HUSKY A-1A, N137C, REGISTERED TO ^PRIVACY DATA OMITTED^ NORTHERN WINGS AVIATION LLC, WAS FLYING A GRIZZLY BEAR SURVEY FLIGHT WHEN THE PILOT, ^PRIVACY DATA OMITTED^ ENCOUNTERED DESCENDING AIR AND RISING TERRAIN AT LOW ALTITUDE. HE EXECUTED AN EMERGENCY LANDING ON A PLATEAU IN THE MOUNTAINS 35 MILES SOUTH OF ENNIS, MT. THE PILOT SUSTAINED A MINOR INJURY TO HIS FOREHEAD AND THE PASSENGER WAS UNINJURED, THE AIRCRAFT WAS CONSUMED BY FIRE. VISUAL METEOROLOGICAL CONDITIONS PREVAILED AT THE TIME, AND A VFR FLIGHT PLAN WAS NOT FILED.

## The NTSB's investigation of this event (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 GAA19CA432](https://openairdocs.org/ntsb/GAA19CA432), Jul 17, 2019: Aviat A1 (N137C), Ennis, MT, destroyed. Probable cause: The pilot's exceedance of the airplane's critical angle of attack while turning at low altitude, which resulted in an aerodynamic stall. Contributing to the accident was the pilot's distraction due…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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