Try loading up a default aircraft in FSX. Then refuel and repair the aircraft. See if it starts. If all starts up well and everything checks out to be normal then load the NGX up. Load the panel state to your desired state. After that is all complete save the flight as default in the options page when you first fire up FSX. That same exact problem happened to me and that seemed to fix the problem. I think FSX loads the aircraft in a default mode as if the aircraft is in a permanent state of non operational for some stupid reason. Anyways hope this works for you and please drop a line and let me know how you made out with the fix.

You might need to spool up the left engine a bit to start.

For an APU start? WRONG!! If you use bleed air from the onther engine, yes!FRED

He was supposing that in the NGX was simulated the APU intake cover (wich as far as I know it doesn't) that will be installed when you set the pitot covers from the menu. Same for the switch, I tried to hold to the START position but always returned to ON after half second. The APU will miss to start (with a fault) if it was already started, shut down and started again within few minutes. In this case I think that the fault triggers too often, but, I can live with it.

Yeah ok, But in my case I am starting the plane from a COLD AND DARK state, I have gone to the extent of uninstalling the whole NGX and installing it again, but still the problem persists!!!

Did you update your FSX installation to SP2? Coulda missed that. Were you prompted with a activation message after re installing the NGX? Do you have any issues getting the aircraft up and running using just external power and pneumatic air? If you do have issues getting things up and running, I'm thinkin there could be an activation issue here.

Yeah I did install SP2, but on the other hand I was not prompted for the activation code on re install. I also can't get it up and running using external power, I activate external power on the FMC but can't seem juice up the plane with it! I am starting to believe it might be activation problem aswell because I have started this plane so many times and have never had this problem. Any ideas on how to solve this problem?

2 points:Are you using a saved panel state made before you installed the latest sp? If yes, this is the problem, when you uninstall, delete all saved .fmc and .sav files.If no luck, Contact pmdg with a ticket

I don't mean to be condescending, but assuming you don't have any failures engaged, follow your checklists to the letter. The only time I could not start engines was because I forgot to turn off both packs. Make sure your APU is running (it takes a while for it to spool up) and that your APU generator switches are on, and you have one fuel switch on to provide go juice to the APU (not sure if that matters, but the tutorial says to do it). The checklists are your friends.

Ya, if you weren't prompted for an activation after a complete computer format and re-install I think it's best to fire off a ticket to support.precisionmanuals.com and see what's going on. Some services may not be enabled or something.

...and that your APU generator switches are on...

Aren't these supposed to be switched on after the APU is running 100%?

Aren't these supposed to be switched on after the APU is running 100%?

yes....and I can see from my message that I did not make that clear. Don't hit the switches until that "APU Gen Off Bus" light comes on.

An important thing to remember:Generator lights will say you if the generator is avaiable (the blue lights), the system is designed to check the quality of the sources and will allow you to turn them on only if the quality is good.You can check the quality by selecting the source (in this case the APU) on the electrical meter selectors.You will be not allowed to turn on the APU GEN if it is not avaiable, you can click as many time you want, but if it is not within 115V and 400+-5Hz it will not come on.Another thing (the last time I tried, I've seen it is not simulated but I will try again), if you turn the generator switch to OFF, you will reset the GCR (the relay that gives excitation field to the generator) so disabling it.You will say, yes, it's normal... yes, but if you use the switch to turn the source OFF, you will be not able to see the voltage untill you turn back the switch to ON.This means that, if you're turning off the plane this night, and you switch the APU GEN to OFF you will turn off the magnetic field (by the GCR)Tomorrow, you will start the APU, it reaches the 100%, and look at the meters, you will find no voltage and no frequency. The only way to restore it is tu turn the switch on, making it will reset GCR, will then generate the field, it will be checked by the GCU and it will be turned on.The same thing happens with the fire switch, when the fire lever is pulled, it will reset the GCR this removing the magnetic field so, no voltage and frequency.I'm pretty sure it is another little thing that pmdg missed, but I need to check it.

Checked, the NGX will not give APU GEN data (freq and voltage) when it is ready but unpowered, istead, for IDG that data are avaiable.However, moving the switch to OFF will not result in 0V 0Hz for the IDG, neither for the APU when already powered.

2 points:Are you using a saved panel state made before you installed the latest sp? If yes, this is the problem, when you uninstall, delete all saved .fmc and .sav files.If no luck, Contact pmdg with a ticket

I made sure to delete all PMDG files after un-install and saved only the FLIGHTPLANs...I guess that's what I'll have to do!! Thanks

I don't mean to be condescending, but assuming you don't have any failures engaged, follow your checklists to the letter. The only time I could not start engines was because I forgot to turn off both packs. Make sure your APU is running (it takes a while for it to spool up) and that your APU generator switches are on, and you have one fuel switch on to provide go juice to the APU (not sure if that matters, but the tutorial says to do it). The checklists are your friends.

My problem here in starting the engines is that I cannot get the Ground Power to feed the airplane, nor will the APU start up for that matter! So without neither there is no way I can get to that step of turning the engines on... and I "DO" Follow Check lists

Just curious, does the Air Starter Unit cart works on your plane?If yes you could try the DC engine start.The procedure from C&D is this:Batt... ONASU connected and supplying pressurepacks off (just for safety)isol openENG 2 switch to GNDsame as a normal start.See if you will get the main generators online.Another point to check, loading the different panel states, will load the plane powered? Try the NGXdefault flight and see if it works, start the APU with the aircraft powered, maybe your battery is near to be discharged.Also check the fsx sliders as shown in the intro manual.More than this I have no ideas.

Are there any prerequisites for the APU to start as I quite often get the "Low Oil Pressure" light that won't turn off and then I have to connect the air start unit and start the engines before pushback?Battery ON of course, one left fuel pump on (center tank if there's fuel otherwise the left wing aft) and what else? Packs maybe?Cheers!