For APU start battery power (and sufficiently charged) plus fuel in the left tank is all you need to start it.If you have already AC power is better because the APU will start from AC power and not from DC.Low oil pressure is a normal indication when the apu is spooling.A pump is not required for start, in DC start noone of the main pump works. The apu will use its own DC automatic pump.Bleed and other stuff becomes avaiable only when APU is ready to load, if the bleed is then OFF is better to increase APU life.If low oil pressure won't turn off during start, you have problems. What about EGT indication?Have you the MAINT light on?

Failures have been turned off since day one of my installation so I'd be surprised if it's something like you describe.Thanks anyway as at least now I know that battery and fuel (of course!) is the minimum I need.Do the packs and/or valves and/or bleed have to do anything? Maybe must be OFF to impose less strain during startup or this has nothing to do with it?

The bleed valves are electrical commanded, pneumatically operated valves, with APU off (or engines) there is no way to open them.The APU fadec will also inhibit the bleed command during the start. This means that either ON or OFF the bleed valve is closed until 100% is reached (if I remember correctly 95%) then it removes the inhibition.So, what you need are only the 2 things I listed. If you want to add a third, make sure that APU fire handle is in the normal position.

ENG 2 switch to GND

You sure about that, Andrea? The hookup point is on the right side, so should be starting number 1 first. But it should start also number 2 afaik

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... ON ASU connected and supplying pressure packs off (just for safety) isol open ENG 2 switch to GND same 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.

Andrea thanks for the help, I apreciate it, but wouldn't un-installing it rid me of all these problems? I mean thats what I did, and so I have sent a ticket to PMDG to see if they got something on this!!! I will let you guys know what and if they come up with a solution!!Cheers

You sure about that, Andrea? The hookup point is on the right side, so should be starting number 1 first. But it should start also number 2 afaik

You're right ;) 1 first, my fault sorry ;)

Fabo, I must correct me again returning to the ENG2 first.I checked a little doubt right now regarding the isolation valve power.Isol valve is powered by the 115VAC from xfer bus, this means that if the aircraft was unpowered with the isolation valve closed, the DC start for ENG 1 is not possible because the cart is connected on the right, and the isolation valve is closed (another reason to leave the isol in AUTO when you shut down the plane)

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.

Patrick you were right!Guys I managed to fix it! Aparently I had to start the NGX base pack first, and then go and load the 600/700.When I loaded the base pack it asked me imediately for the activation code, and then everything was working as it should!!Thanks Y'all

Fabo, I must correct me again returning to the ENG2 first.I checked a little doubt right now regarding the isolation valve power.Isol valve is powered by the 115VAC from xfer bus, this means that if the aircraft was unpowered with the isolation valve closed, the DC start for ENG 1 is not possible because the cart is connected on the right, and the isolation valve is closed (another reason to leave the isol in AUTO when you shut down the plane)

Yeah, I have a SOP to only manipulate ISOL valve if required by a non-normal. In any case I can not think of a reason why you would not have the aircraft on GPU when doing an airstart.

Suppose you are at a little airport, this airport could supply a single or maximum a couple of GPUs, one breaks, the other is in use on another aircraft.The only way to start the aircraft with GPU is to wait a lot of time. You can save it by DC starting the engine if an ASU is avaiable.

That seems a bit of a stretch... but yeah, could happen in theory.

My normal memory flow is this from standard load with GPU powering the Plane and Engines off.Before Start

• APU start and when APU EGT stabilised
• APU Gen bus over from GPU
• Check EGT on APU has risen
• APU bleed on and packs off
• Engine start to GND
• check N2 rising and at 25% N2 Fuel in
• repeat above 2 for engine 2

After Start

• check engines stable
• Gens over to ENG
• APU off
• Taxi light on

Does my memory flow sound good to you guys?

Add to that air config and you are good to go.

That seems a bit of a stretch... but yeah, could happen in theory.

Here in Pescara we have only 2 GPUs, it is a small but international airport wich is often used during winter as an alternate airport.It is not unusual to see a lot of planes landing when Rome airport is closed for bad wheater. I never seen a DC start, but it is possible to do it.

Add to that air config and you are good to go.

My normal memory flow is this from standard load with GPU powering the Plane and Engines off.Before Start

• APU start and when APU EGT stabilised
• APU Gen bus over from GPU
• Check EGT on APU has risen
• APU bleed on and packs off
• Engine start to GND
• check N2 rising and at 25% N2 Fuel in
• repeat above 2 for engine 2

After Start

• check engines stable
• Gens over to ENG
• APU off
• Taxi light on

Does my memory flow sound good to you guys?

You can also add after Packs OFF:Isol Valve OPEN (not sure if leaving it at AUTO works the same)Anti Collision lights ON (just for typical simming reasons)