A major problem can be incorrectly torqued wing attach bolts. Constant aeros can cause problems so maintenance must be on top. Any loose bolts should be replaced with new ones.
Feet wet Avengers. What a nice sight. You are of course correct in your observation that the Avenger was one of the GREAT aircraft of WW2. FRom the beginning to the end and some. Sort of a Gooney Bird of bombers….