P4 1.7GHz, ATI Radeon 9600 Pro, 512MB, WinME, DX9.0
I've seen this also, but it was with the other wing shot off, so it's a problem on both sides of the 51.
I noticed this just sitting on the runway, changing the field's ownership via country reset, and letting the ack shoot me up. Might be a good idea to do this will all the planes to see if any others have similar problems.