V1.2

[IanHarrison 522]

Thanks for the update.

Unfortunately, my Button version still has the Split IRS and No land 3 warnings.

 

[byork 2,259]

54 minutes ago, IanHarrison said:

Thanks for the update.

Unfortunately, my Button version still has the Split IRS and No land 3 warnings.

 

Make sure all the EIU knobs are in the "auto" position on the Capt and FO's side.

 

[IanHarrison 522]

They are, both of them.

[byork 2,259]

You might want to ask PMDG and ask them what conditions can lead to the Split IRS No Land 3 scenario.

Does this happen even if you don't run the pre-flights?

 

 

[IanHarrison 522]

I haven't tried without the pre-flights yet.

The funny thing is that it seems to make no actual difference: I carried out an auto land after a 12 hour flight quite successfully despite having those warnings.

I will raise a query on PMDG and see what happens.

[IanHarrison 522]

After extensive checking, the problem seems to be that the FO turns the APU off while the engines 1&2 are still starting.(I don't use ground power). While the APU runs all 3 IRS's are working. Once the engines start (4&3) one IRS has power but the other two are cut off with the shut down of the APU and this causes this error. If I manually turn the APU on again and wait 7 minutes for the IRS's to reset, all is fine.

Am I right to think that the APU should be on until all engines have settled?

Ian Harrison

 

[byork 2,259]

Hi Ian,

The APU would normally come off during the "Before Taxi" procedure as part of the FO's flow.

Are you triggering this flow prior to all engines being stabilized?

 

[IanHarrison 522]

Hi Bryan,

You have hit the nail on the head.

I watched the lower overhead while the engines were starting and I had been starting the Taxi procedure when GSX gave the "all clear". This is about

2 minutes too early. If I wait for the ignition lights to extinguish first, then everything happens as it should.

Thanks for being so patient with such a small matter. Much appreciated.

Ian Harrison

[byork 2,259]

1 hour ago, IanHarrison said:

Hi Bryan,

You have hit the nail on the head.

I watched the lower overhead while the engines were starting and I had been starting the Taxi procedure when GSX gave the "all clear". This is about

2 minutes too early. If I wait for the ignition lights to extinguish first, then everything happens as it should.

Thanks for being so patient with such a small matter. Much appreciated.

Ian Harrison

Glad you got it sorted :-)