Just a few comments that may help clear the matter of centre section life.
A study of this subject by yahoo search will reveal countless posts on the matter most coming from areas with considerable authority.
It needs to be understood that the problem is associated with design and QA has nothing to do with it.
Some of these posts show clearly the developement of the centre section and what various Air Forces including the RAF RAAF AND USAF are doing to overcome the problem.
Regards
Col