Anyone seen this and have a view? It appears to affect flange nuts installed Oct 2017 and after with the mark ZB and have to be replaced at the next 100-hr. https://support.cessna.com/custsupt/contacts/pubs/ourpdf.pdf?as_id=53468&fbclid=IwAR0puO2rFNKmU99UVNUGvHqE3aVpiO6Sr_lnHJjSYFBdrxso5d1xm4yznZE