1 fatality

Night Training Accident Near Hay Bluff Involving Twin-Engine Aircraft (N9879)

Llanthony, United KingdomFlight

On March 2, 1940, an Avro 652 Anson (registration N9879) operated by Royal Air Force - RAF was involved in an aviation accident near Llanthony, United Kingdom in flight. One person was killed. Investigators recorded the probable cause as: Loss of situational awareness due to poor visibility caused by night conditions and a thick cloud layer led to controlled flight into terrain. 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 aircraft crashed into a hill near Hay Bluff during a night training exercise due to poor visibility and cloud cover, resulting in one fatality and three injuries.

What happened

The incident occurred during a night training exercise conducted on behalf of the 6th Air Observers School. While en route, the flight crew lost their position because of reduced visibility caused by darkness and a thick layer of clouds. At an altitude of approximately 660 metres, the twin-engine aircraft struck a hillside near Hay Bluff. The impact destroyed the airframe completely.

Findings

The crash resulted in the death of one member of the crew. The remaining three occupants sustained injuries. The primary contributing factor was the combination of night conditions and dense cloud cover, which prevented the crew from maintaining situational awareness until the terrain impact.

Probable cause

Loss of situational awareness due to poor visibility caused by night conditions and a thick cloud layer led to controlled flight into terrain.