No fatalities

RAF aircraft crash in Snowdonia range with four crew surviving (EF909)

Mt Foel Grach, United KingdomFlight

On November 30, 1943, an Avro 652 Anson (registration EF909) operated by Royal Air Force - RAF was involved in an aviation accident near Mt Foel Grach, United Kingdom in flight. No fatalities were reported. Investigators recorded the probable cause as: Collision with terrain during a night navigation exercise in low visibility 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 2026-08-05Data APIEditorial standards

An RAF aircraft crashed into the Carneddau mountains during a night navigation exercise. Four crew members survived, with one found trapped in the turret after two days.

What happened

On the night of 1 December, a military aircraft was conducting a cross-country navigation exercise departing from its base at Jurby on the Isle of Man. The flight path involved a circular route over the Irish Sea. While flying westward, the aircraft encountered the gentle grassy slopes of the Carneddau range in Wales and crashed.

Following the impact, two members of the crew managed to walk down the mountain to Bethesda, where they spent the night inside the wreckage before reaching the village store. The RAF Mountain Rescue team based at Llandwrog was alerted by the station's Flying Control Officer around 12:30 on 1 December. Initial searches north and west of Carnedd Llewellyn yielded no results before sunset forced a withdrawal.

The following morning, search operations resumed at 07:30 near Carnedd Dafydd. At 11:00, a third crew member was reported to have reached Bethesda and provided specific details regarding the location of the aircraft and the remaining survivor. Search parties were redirected to the area between Foel Grach and Garnedd Uchaf, near the cliffs of Craig y Dulyn. By 15:30, the wreckage was located. The fourth crew member was found alive inside the aircraft's turret. He was reported to be suffering from dehydration, starvation, and a fractured foot, but remained in high spirits. A stretcher party recovered him, and he arrived at the ambulance after nightfall.

Findings

The accident occurred during a low-visibility night navigation exercise. The crew successfully evacuated the aircraft on foot, with three members reaching safety independently. The final survivor was trapped in the turret for approximately two days before being located by rescue teams using coordinates provided by the other survivors.

Probable cause

Collision with terrain during a night navigation exercise in low visibility conditions.