Lancaster Loss, 24/25-02-1944

[Alex Smart]

Hello,
Am seeking info on the loss of Lancaster III, JB540 - "PH-L" on the night of 24/25-02-1944.

I see from other on line sites that the details of the aircraft are listed as "unknown". This is of course in relation to the loss of one of JB540's crewmen. Namely 1Lt. S.W.Penner USAAF. All seven crew were killed.

The MACR, numbered 9739 does include the Lancaster details, it's, Squadron, and serial number so cannot understand why the "unknown" is noted as I noted earlier.

Secondly Within the MACR report there is reference to 1Lt. Penner's RCAF Log book, giving details of the last three operations that he had flown, including his last.
So my second inquiry is about 1Lt. Penner. Was he originally an American in the RCAF, that chose to transfer to the USAAF and was then seconded to the RAF by his American Unit, the number of which is not noted.

Thirdly does anyone know 1Lt. Penner's USAAF Unit , which I presume to have been a Bomber Group/Squadron ?

Many thanks
Alex