Here is the link of NARA T1022 R3047:
https://catalog.archives.gov/id/3386...objectPage=694
Check sheet number 694, among papers of U-281 navigation diary, that is about Oct.17th 1943.
It is clearly shown the Sunderland shot down from "Dauter" (Helmut Dauter, U-448) and the attempt to sink U-281 from a "Liberator". U-281 fired with AA guns. 2 soldiers wounded.
According to the help you all gave me above, it looks that the B-24 belonged to RAF No.120 Squadron. But I cannot find evidence of this....
Anyone can help me?
Is there a possibility to find the RAF Squadrons war diaries concerning U-boot hunt?