What does it mean, thanks!
Not exactly sure your question. 90 days means 90 days past from the day you’re looking at your stats
In a 90 day period. So from today and going back the last 90 days I have X amount of landings for example.
So if haven’t flew between 90 days I lose my grade?
Yes, that is correct.
Oh ok do I have to keep flying every week or whenever I want to fly?
Just as you do, you have to keep flying. 90 days is three months. Basically, every day will count as a day.
Say, you had 1 landing on January 1, that stat would be gone, 3 months later on April 1
Ok so as long as I fly between 3 months I’m good?
Yes, as long as you fly the required number of hours, make the required number of landings, etc. in the past 90 days, you should be okay.