Originally Posted by
ManaAdaSystem
SAS are now in a process of changing from Boeing to Airbus, but a number of their 737’s are from the same time period as the two with cracks.
Yet, only two of them had cracks.
Not sure how many cycles they have, but they fly a large network of shorter domestic and Scandinavian routes, so I expect them to have a rather high number. 30000 and above?
Why one aircraft but not the one produced at the same time, operating in the same environment/area and with the same amount cycles ?
This is what puzzles me.
Yes, it's decidedly difficult to see a discernible pattern. LN-RPK and SE-RET were built just over two years apart and both have cracks. You've then got LN-RNO and -RCN built just months either side of LN-RPK; no cracks.
Similar anomalies bob up in other fleets. Qantas's oldest B738, VH-VXA, cracks; -VXB, which came off the production line within a day and that actually has about 200 more cycles than -VXA, no cracks.