Originally Posted by
Tomaski
It would be interesting to compare crack incidence with type of winglet and how many cycles since they've been installed. Some of these aircraft may have accumulated a lot of their cycles prior to having winglets installed.
Also, retrofit winglets vs. production build winglets. I'm sure Boeing is looking very closely at the inspection results to see what sort of patterns there might be to which aircraft have cracks - winglets, sub-models (600-700-800-900), line numbers, etc. as well as hours and cycles.
Chris2303, you do know that it was Boeing that first discovered the cracks while doing 737 Freighter conversions, and self reported the issue to the FAA, right?