I was unaware of that, thanks. Google, wow!

For anyone else as disconnected as myself, I copied this from cranky flier...

"Pratt had discovered an issue with contaminated powdered metal used in manufacturing between Q4 2015 and and Q3 2021 that could cause cracking in the stage 1 and stage 2 disks in the high pressure turbine. These obviously must be inspected at certain intervals to ensure there is no actual problem."

https://crankyflier.com/2023/09/26/the-problem-with-pratt-whitneys-pw1100g-engines-on-the-a320neo-family/