In more windy conditions they go like the proverbial clappers!
And, if they don't, expect big time trouble on departure.
Excessive vibration.
Fan blades are meant to move, if they do not, lubrication is very necessary.
In sandy desert locations, many times done every day.
Ours (RB.211) are lubed every turnaround...and with 800 meters vis at JED (as it was in early January), with blowing sand, very necessary, for continued satisfactory ops.
RVR on two days at JED went down to 300 meters for takeoff, landings aborted, takeoffs only...blowing sand is a mess.
Many diversions.