I read in the manuals that each pacific Ngx logs your flying hours, we're would I find this please, i can't seem to find this info, thanks in advance RegardsPaul

Paul,It's located in the (at least for me) FSX/PMDG/PMDG737NGX/AIRCRAFT folder. You'll see all of your installed planes/reg numbers. Most of them will likely indicate 2kb, but the ones you've flown will have a higher number. Open those files, and you'll see something called "run timer". Unfortulately, I'm not sure what it all means, but just wanted to point out where it was located. Hopefully someone else can chime in with more detailed info.

Does someone know how to change those values so that my NGX is a little bit more used, like a few thousand hours? I want my service based failures to do something :(

What I would really love is a random Maintainence hours option. As an airline Pilot you dont know what hours the aircraft your about to fly has on it untill you see the logbook. Unless you are a single Crew/Single Aircraft Airline of course hehe.Then we would need to check everything is ok before a flight.