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WPR19FA086 · Beech D55

21 Feb 2019 · Stallion Springs, CA, United States

Beech D55 · Accident: VFR encounter with IMC en route

From San Luis County Regional Airport (SBP) to Whiteman Airport (WHP)

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Event

NTSB case
WPR19FA086
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
3 · 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
Unknown

Beech D55

Aircraft type
Beechcraft 55
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
N533Q
Operator
Unknown
Onboard fatalities
Unknown
Route
From San Luis County Regional Airport (SBP), San Luis Obispo, CATo Whiteman Airport (WHP), Los Angeles, CA
Aircraft age
About 51 years (built 1968)
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
En route · cruise
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
VFR encounter with IMC
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

  • Environmental issues › Conditions/weather/phenomena
  • Environmental issues › Physical environment
  • Personnel issues › Action/decision
  • Personnel issues › Task performance

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 departed on a visual flight rules cross-country flight with two passengers. There were no communications with air traffic control, and the flight did not arrive at its intended destination. The wreckage was located the next day on rising, mountainous snow-capped terrain at an elevation of about 6,700 ft mean sea level.

Examination of the wreckage revealed that the airplane initially impacted trees and left a distribution path of about 392 ft, which is consistent with controlled flight into terrain. Examination of both engines at the accident site revealed no evidence of a mechanical anomaly that would have precluded normal operation. The propellers from both engines exhibited impact damage with rotational scoring on the cambered surfaces and torsional bending of the blades, and damaged trees around the wreckage exhibited 45° cut sections that appeared to be from the propeller blades, consistent with the engines producing power at the time of impact. There were no records of the pilot obtaining a weather briefing or filing a flight plan before departure; it is unknown if the pilot reviewed other weather sources before the flight. Along the route of flight, the combination of a low-pressure system at the surface and at 500-hPa provided the support for upward vertical motion and the development of rain showers and thunderstorms, with snow showers in higher elevations. Terrain above about 4,600 ft in the vicinity of the accident site was likely obscured in clouds with light freezing conditions and snow about the time of the accident. The available weather reports, forecasts, and advisories depicted the conditions and identified instrument flight rules and icing conditions along the route of flight. Had the pilot obtained a weather briefing for his planned route of flight, he would have been aware of the weather hazards, and alternate routing may have allowed for safe operations in visual conditions.

Probable cause

The pilot’s continued visual flight into instrument meteorological conditions associated with mountain obscuration conditions, which resulted in controlled flight into rising terrain. Contributing to the accident was the pilot’s failure to obtain a weather briefing.

Verbatim NTSB analysis and probable cause from the NTSB dataset

Sources

NTSB record WPR19FA086
Event ID
20190222X72357
Case number
WPR19FA086
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: local date, investigation status, coordinates, cause areas. Values present in the bulk record are kept.
  • The date is the local date; the NTSB stores the UTC date 2019-02-22.
  • API snapshot SHA-256: 341ad0418451407b981e96fb78083e798264a3f085d157b826fe42bfcf45331b; retrieved 2026-09-15T06:54:30.909Z.