737NGs have cracked 'pickle forks' after finding several in the jets.

[futurama]

Originally Posted by infrequentflyer789

Leehams is reporting today that the incidence is 5% over the first 500 inspected. https://leehamnews.com/2019/10/08/bo...-2/#more-31313

An interesting data point: as of yesterday Southwest found only two jets with cracked pickle forks. They have some of the oldest 737NGs (being the launch customer for the 737-700, many of which were slated to be retired this year) -- and presumably inspected their oldest aircraft first to comply with the AD's 7-day limit.