Douglas Boston Mk.III Z2186 of No.418 Squadron RCAF, flew into Carnedd Dafydd in the Carneddau on Saturday 17th October 1942 whilst on a cross country navigation training flight from Bradwell Bay in Essex

 

Mervyn Sims Sergeant RCAF Pilot Injured
Harold Francis Longworth Flight Lieutenant RCAF Air Observer Killed
Ronald Walker Sergeant RAFVR Navigator / Bomb Aimer Killed

The interesting fact that I noticed with the crew was that two of them were navigators, since Air Observer was the term used used for the combined role of navigator & bomb aimer in the early war years.

Wreckage at the crash site of Douglas Boston Z2186 on Carnedd Dafydd, Snowdonia, Wales
Today only a single sheet of armour plating and a slate plaque remain at the crash site, until 1977 almost the entire aircraft was at the site but the remains were recovered for use in a restoration project by the Boston-Havoc Preservation Trust. In 1984 in the very much misguided clear up operation that the Snowdonia National Park Authority carried out the engines were removed.
Plaque at the crash site of Douglas Boston Z2186 on Carnedd Dafydd, Snowdonia, Wales
As with many other sites in the area this one has a slate plaque recording the crash.