Don't know the case today, but in my time in helos it was legal for only time not in contact with mother earth that went in the maintenance log, ground running didn't count. On some jobs, to pull some figures out of the nether regions by way of example, you could spend eight hours sat at the controls running, but only three hours airborne, three went in the maintenance log, the customer got charged for eight, guess what went in the PIC column of the personal log.