UC-78 Ground Loop, 12th June 1943.

Hello,
Interested to find details on the ground looping of a UC-78  serial number 42-58130 on the 12th June 1943 in the USA.
Pilot was Charles G. Willes.
Others on board were:
Randolph F. Churchill; Samuel J. Viola; John F. Squicciarino and Robert A. Larock.
Could this Churchill be none other than Winston's son ?
Alex