LTNABZ
Don't know any of the specifics of the S92 'grounding', but it's software is written so that there are some 'no dispatch' faults that are not visible to the pilots in flight (don't want to worry the poor dears). The warning only occurs after landing where it is assumed that maintenance support is available. Obviously this is less than helpful if the fault occurred on the climbout from the home base and you are then stranded on a rig.