[Laurent Rizzotti]

Thanks a lot for you reply. So actually even more than 25 Bf 109s were involved, but not all were destroyed. Of the 33 machines, 30 were damaged, 5 over repair (60% or more). These 5 have "schrott" written next to their WNr, and a possible translation of this German term is that they were dumped. The strange thing is that the same term is listed next to three damaged aircraft that could have been repaired (20-35%), while it is not for aircraft damaged up to 50%.

I also notice that all five of the damaged beyond repair aircraft have WNr in the 41xxxx range, and were newer than most of the aircraft involved.

Of your list, this are the WNr that I found in my Norway loss list before 13-14 August 1944 (by the way I see that your document uses the date of 13rd, while my Norwegian source says the 14th. Does the sabotage take place during the night of 13-14.)
13787: a Bf 109 G-2, damaged at 10% with III./JG 5 on 9 July 1943
14020: a Bf 109 G-2, damaged at 15% with I./JG 5 on 1 April 1943
14623: a Bf 109 G-2, damaged at 20% with IV./JG 5 on 17 April 1943
14698: a Bf 109 G-2, damaged at 35% with Stab./JG 5 on 9 June 1943
14922: a Bf 109 G-4, damaged at 30% with 1.(F)/120 on 15 October 1943
10534: a Bf 109 G-2, damaged at 30% with Überführ.Kdo./LZ Gr.1 on 30 April 1943
19405: a Bf 109 G-4, damaged at 20% with 1.(F)/120 on 18 November 1943
20228: a Bf 109 G-2, damaged at 15% with IV./JG 5 on 27 October 1943
20259: a Bf 109 G-6, damaged at 10% with IV./JG 5 on 4 October 1943
10333: a Bf 109 G-2, damaged at 10% with I./JG 5 on 17 June 1943
20332: a Bf 109 G-6, damaged at 20% with V./JG 5 on 1 October 1943
19399: a Bf 109 G-4, damaged at 20% with 1.(F)/124 on 29 April 1943

And these are the losses I found after:
410780: a Bf 109 G-6, 100% loss on 12 March 1945 with 13./JG 5
410768: a Bf 109 G-6, 100% loss on 16 May 1944 with III./JG
15811: a Bf 109 G-6, 100% loss on 26 March 1945 with III./JG