On the 902 (P&W 206E) we comp wash and PAC each day.
During the PAC the aircraft logic records this as flying time (around 2 minutes total) because the aircraft is in a flight configuration, albeit with one engine at idle. Also the IIDS will record 2 flights (1 for each engine check).
Come midnight and the tech log totals are added, the IIDS total flight time reading and Tech Log totals match up.
So in our case the PAC time is recorded, but as far as normal ground run times, because the aircraft is not in a flight configuration, (CLP being <6%), then this time is not recorded, however the engine starts will be.
Hope it makes sense and helps.
