4 fatalities

Twin-engine training aircraft crashes in Snowdonia mountains (N9562)

Mt Mynydd Tal-y-Mignedd, United KingdomFlight

On January 7, 1942, an Avro 652 Anson (registration N9562) operated by Royal Air Force - RAF was involved in an aviation accident near Mt Mynydd Tal-y-Mignedd, United Kingdom in flight. 4 people were killed. Investigators recorded the probable cause as: 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 2026-08-05Data APIEditorial standards

A twin-engine trainer crashed into a mountain slope in the Snowdonia range due to poor visibility during a training flight, resulting in four fatalities.

What happened

The incident occurred while the crew was conducting a training sortie in the Snowdonia Mountain Range. The aircraft was navigating through a valley when it encountered marginal weather conditions that significantly reduced visibility. Flying in these poor conditions, the twin engine airplane struck the slope of Mt Mynydd Tal-y-Mignedd. The impact site was located 12 km southwest of Caernarfon. All four crew members on board were killed in the accident.

Findings

The official investigation determined that the crash resulted from a controlled flight into terrain. This conclusion highlights the critical role of weather conditions and visibility limitations in the sequence of events leading to the impact.

Probable cause

Controlled flight into terrain