SEA07LA276 · Werner Vari-Eze
Werner Vari-Eze · Accident: loss of engine power on approach
From Kanab Municipal Airport (KNB) to Bolinder Field Tooele Valley Airport (TVY)
Event
- NTSB case
- SEA07LA276
- 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
Werner Vari-Eze
- Aircraft type
- Werner VARI-EZE
- Category
- Airplane
- 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
- N547DB
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Kanab Municipal Airport (KNB), Kanab, UTTo Bolinder Field Tooele Valley Airport (TVY), Tooele, UT
- Aircraft age
- Not recorded
- 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 downwind
- First occurrenceThe 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
- Loss of engine power
- 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
- Reason for occurrence undetermined
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The pilot said that as he approached his destination, he noticed a large thunderstorm over the airport. He said that his wingman elected to land, but radioed back to him that it was very bumpy. The pilot said that his first two attempts at landing ended with go-arounds due to severe turbulence. On his third attempt, he lost engine power and selected a field for a forced landing. During the forced landing, he encountered severe wind shear (downdraft) on two occasions. During his landing flare, the airplane's main landing gear impacted a ditch and separated from the fuselage. Photographs of the wreckage indicate that the outboard right wing skin had delaminated from the spar and both wing root areas exhibited visible cracks in the upper wing skin. An aerospace engineer from the National Transportation Safety Board said the cracks above the main spar carry through structure indicate hidden damage in the spar. A Federal Aviation Administration inspector and the pilot examined the airplane in the field. They identified no abnormalities with the engine; the reason for the loss of engine power was not determined.
Probable cause
The loss of engine power for an undetermined reason. Contributing factors were the lack of suitable terrain for the forced landing and the wind shear conditions encountered during the forced landing attempt.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record SEA07LA276
- Event ID
- 20071205X01902
- Case number
- SEA07LA276
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
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, coordinates. 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: 4bc0587ee3c1dccc1df507c3272ebf219bed2e9b275839f66c78bc9948eef32b; retrieved 2026-09-22T03:27:49.572Z.