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RAF Ansty Flying School Training Accident Near Swansea (L9149)

Ystradgynlais, United KingdomFlight

On January 17, 1939, an Avro 652 Anson (registration L9149) operated by Royal Air Force - RAF was involved in an aviation accident near Ystradgynlais, United Kingdom in flight. 2 people were killed. Investigators recorded the probable cause as: The official findings indicate that the crew lost their spatial orientation while flying in poor weather conditions. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-08-04Data APIEditorial standards

A twin-engine trainer crashed into a hillside near Swansea during a training flight in poor weather, resulting in the deaths of both crew members and injuries to two passengers.

What happened

The incident involved a twin-engine aircraft operating on behalf of the RAF Ansty Flying School, based near Coventry. The aircraft was conducting a training exercise with a total of four people on board: two crew members and two passengers. During the flight, conditions deteriorated into poor weather while the aircraft was in cruise.

While navigating these adverse conditions, the aircraft impacted the slope of Mt Fan Brycheiniog, situated approximately 20 kilometers northeast of Swansea. The crash resulted in fatal injuries for both individuals in the crew positions. The two passengers sustained non-fatal injuries and survived the accident.

Probable cause

The official findings indicate that the crew lost their spatial orientation while flying in poor weather conditions.

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