In the earlier days of the RB211 there was a schedule to power run and change scavenge filters after only a few days of engines being static; reason: the carbon deposits lining some oil passage ways, mostly near the hotter sections, would detach and clog the filter leading to an IFSD.
An improved filter area and oil spec largely cured the problem.
It would be standard practice, if the aircraft was weight on wheels to schedule a rotation of same to avert flat spots.