[Henk Welting]

Thanks friends for your answer. I finally found the name of an RAF-airman who may have been aboard this B 17 (as a Met. Observer of 517 Sqn) and the date was not 2-4-1944, but

2 or 3 February 1944

Probably also 7 USAAF-crew missing. The problem is that death certificates USAAF-losses and no eyewitnesses of the accident available were dated one year and one day after the missing date.
The B17 (pres. a type F from Bovingdon) took off from Brawdy/Pembs.

Regards,
Henk.