That the SW -700s may have been some of the earliest US aircraft inspected made me wonder..... How common are these parts between NG (and perhaps classic, original, and MAX) models? Ie, if it's the same PN for all the NG aircraft, and the -700 is one of the lighter NG variants, one might expect to find relatively more cracks, all else being equal, on the heavier variants like the -800 and -900...