FTW99FA044 · Beech 58
Beech 58 · Accident: in flight encounter with weather on approach
From F62 · Idabel, OK to University of Oklahoma Westheimer Airport (OUN)
Event
- NTSB case
- FTW99FA044
- 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
- 1 · all aircraft and ground
- Ground fatalities
- 0
- 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
- Instrument Meteorological Cond
Beech 58
- Aircraft type
- Beechcraft 58
- 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
- N1826S
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From F62 · Idabel, OKTo University of Oklahoma Westheimer Airport (OUN), Norman, OK
- 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 · IFR initial approach
- 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
- In flight encounter with weather
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Destroyed
Cause areas
- Pilot in command › Flight into adverse weather, inadvertent
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The 4,550-hour pilot received two weather briefings and filed an IFR flight plan for the 152-nautical mile flight. The briefers informed the pilot of Convective SIGMETs, AIRMETS, and a Severe Thunderstorm Watch in effect along the route of flight. Approximately 19 minutes before the accident, a Boeing 737 executed a missed approach after encountering severe turbulence and wind shear during an approach to an airport 12 miles northwest of the accident airplane's destination. The pilot was informed of this encounter by air traffic control. As the flight neared its destination, the pilot was cleared for a localizer approach to runway 03. The airplane was observed on radar about one mile north of the final approach course. The pilot reported that he was not going to be able to continue the approach. When questioned by the tower about his intentions, the pilot replied, 'I am going to stay right here until I get out of some of this.' The wreckage of the twin-engine airplane was located a mile north of the final approach course, about 6 miles southwest of the landing threshold for the runway. Physical evidence and ground signatures at the initial point of impact indicated that the airplane, configured with the landing gear and flaps in the retracted position, impacted the ground on a measured magnetic heading of 342 degrees at a high speed in a nose low attitude in a slight left turn. Examination of weather data revealed that the last radar return from the airplane occurred in the vicinity of a frontal boundary, where strong wind shear and severe turbulence were present.
Probable cause
the pilot's loss of control due to his inadvertent encounter with severe turbulence and wind shear during an instrument approach. Factors contributing to the accident were the severe turbulence and the wind shear.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record FTW99FA044
- Event ID
- 20001211X11553
- Case number
- FTW99FA044
- 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. 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: b8f7aa3ba21626d160ca083e967c38abd9aa0d7810700a022f3ecbf58684c1d3; retrieved 2026-09-20T22:18:28.999Z.