4 fatalities

Night Training Flight Crash Near Llangollen (N4966)

Llangollen, United KingdomFlight

On August 21, 1942, an Avro 652 Anson (registration N4966) operated by Royal Air Force - RAF was involved in an aviation accident near Llangollen, United Kingdom in flight. 4 people were killed. Investigators recorded the probable cause as: Controlled flight into terrain following a navigation error and the captain's lack of sufficient night flying experience. 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 2026-08-05Data APIEditorial standards

A twin-engine aircraft crashed into a mountain slope near Garth during a night training exercise, resulting in the deaths of all four crew members due to navigation errors and limited night experience.

What happened

The incident occurred during an evening departure from RAF Cranage while the crew was conducting a night training exercise. The aircraft, a twin-engine model, deviated from its intended path due to a navigation error, positioning it significantly further west than planned. As the flight progressed through conditions of drizzle and low mist at night, the captain attempted to maintain visual contact with the terrain by reducing altitude. This maneuver led to a controlled flight into the slope of a mountain located northeast of Llangollen, near Garth.

The impact forces destroyed the aircraft completely. All four individuals on board were killed in the accident. The crew consisted of two pilots, an observer, and a wireless operator.

Findings

Investigations identified that the crash resulted from a combination of factors. A primary contributing element was a navigation error made by part of the crew, which caused the aircraft to stray off course. Additionally, the captain had limited experience in night flying, with only nine hours logged in such conditions at the time of the accident.

Probable cause

Controlled flight into terrain following a navigation error and the captain's lack of sufficient night flying experience.