Hi, I just purchased the 737NG and I can already see that I will not be disappointed with this awesome addon. After reading and studying all of the forum posts it came down to..."I just have to have it"! I think also it was the obvious dedication and professionalism of the PMDG staff and their sense of commitment to the customer that sold me on PMDG. I also purchased the excellent B1900D last week and I needed something like this to tear me away from that exceptional piece of software. Now I am in FS heaven with what will no doubt become my 2 favourite AC. Anyway, I am currently going through the fine tutorial by Fred Clausen and in the 'Flight Deck Preparation" section on the OH Panel it talks about turning on the "Ground Power" switch. When I attempted this the blue "Grd power Available" light does NOT come on. BTW, of course I'm starting from a cold cockpit. When I press below the switch to turn it on it has a spring action and goes back to the Neutral position. I'm sure I am using version 1.3 since I purchased it today. So, if this was a bug in v1.2 I would think it would not continue in v1.3. If anyone else has experienced this and has a work around, please reply to this message. Keep up the great work guys!Regards,Tom Stewart

Im not 100% on this but i think that u have to have the parking brakes on to have ground power available. Adam

You are correct Adam. I did not have the Parking brake on at the time and I just tried that and it worked. But the switch still appears to have a spring action to it. It does not remain in the "ON" position. I assume this is normal.Thanks again for your help sir,Tom

"But the switch still appears to have a spring action to it."This is correct (as per the real aircraft), Tom. Note however, the Park Brake logic is for sim purposes only (this automatically connects the ground power plug to the aircraft external power connection on the right hand side of the fuselage).Cheeers.Ian.