A word search doesn't turn up anything either. In the absence of other information, I would assume the white number in the black circle functions as other aircraft anti-tank values do.
... More and more, people around the world are coming to realize that the world is flat!
Yes, this looks like a sin of omission on the part of the PG: Modern rules writer. I assumed the PG 4th ed rules is our guide and played the PG: M a/c to be read the same way.
Sorry for the delay in answering: I neglected to read this part of the forum messages…
Aircraft AT values are indeed the white numbers in black circle. However, they work differently than in « normal » PG. The numbers are AT values to use vs armor instead of indicating a number of die rolls.