OK, thanks
I was just wondering (concerned) about times on a/c I have been looking at recently, but the system in place for logging tech hours is as you have described.
As training a/c they probably spend a greater portion of time on the ground with engine running, taxiing, power checks, rwy vacate checks, shutdown checks etc etc than an a/c that is not used for training. This will quite happily explain the differences I have noted.
One less worry
Cheers