GAA15CA172 · Schweizer SGS 1 26B B
Schweizer SGS 1 26B B · Accident: windshear or thunderstorm on approach
From Minden-Tahoe Airport (MEV) to Minden-Tahoe Airport (MEV)
Event
- NTSB case
- GAA15CA172
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- Unknown
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Schweizer SGS 1 26B B
- Aircraft type
- Schweizer SGS-1
- Category
- Glider
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N5839V
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Minden-Tahoe Airport (MEV), Minden, NVTo Minden-Tahoe Airport (MEV), Minden, NV
- Aircraft age
- About 51 years (built 1964)
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Approach · VFR pattern final
- Defining eventThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Windshear or thunderstorm
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Aircraft › Aircraft oper/perf/capability
- Personnel issues › Action/decision
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The pilot of the glider reported diverting from his original destination to an alternate airport due to an approaching thunderstorm from the west that he could see. The pilot chose to stay aloft to see which direction the weather was moving. When the thunderstorm started moving east toward the pilot he decided to land. The pilot reported that while he was on final approach for the runway, he was hit by a gust front, the wind shifted and he was blown to the north side of the runway and landed on a dirt road. During the landing roll the glider impacted a fence post and sustained substantial damage to the fuselage and right wing.
A review of local weather data showed nearby convective activity capable of producing significant convective gust fronts. The thunderstorm hazard was forecasted by the National Weather Service prior to the flight, which included a special weather statement for the accident area advising that strong outflow gusts up to 50 miles per hour were possible. The pilot reported receiving a weather forecast the morning of the flight that included the possibility for afternoon thunderstorms.
The pilot reported no preimpact mechanical failures or malfunctions with the glider that would have precluded normal operation.
Probable cause
The pilot's improper decision making in adverse weather conditions, which resulted in an encounter with weather and impact with terrain.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record GAA15CA172
- Event ID
- 20150709X60900
- Case number
- GAA15CA172
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: 6db7304d86493dc19338642353218a14d7e8a1e57bb07583e48684c7f42e5480; retrieved 2026-09-16T02:30:51.944Z.