FWIW the S92 had historical issues with vespel splines on its pumps and no EMlub system, just a useless bypass switch which does nothing unless you have a cooler leak. We're still waiting for the revised MRGB which will hopefully have increased durability, although with a phase 3 MRGB housing crack in Denmark recently we still appear to have some way to go wrt. QA/QC/design.
IMHO a long way to go in improving our current designs in several A/C types, kudos to the bus drivers for making the right decision in this case.
Safe flying
Max