initialize irs : not allowed

[MARTYC74 0]

HI !I've just passed to fsx now and when I want to initialize the irs with the fms, it says : NOT ALLOWED. I have flown the md11 in fs9 a hundred hours and never had that problem. What is wrong? the aircraft is with park brake, engine shut down. Thank you very much for helping.Chris Marty.

[Aaron Buchanan 19]

Do you have DC power applied to the plane? Without power you are going to have a hard time getting gyros to move.

[xxJohnxx 21]

Do you have switched all 3 IRS switches to on?@Lomaric: Do MD11s have normal moving gyros? No lasers?

[sandpatch 9]

I have done some searching but I didn't find any info in the PMDG manuals but if you look in the smartcockpit manuals, or more precisely the FMS manual http://www.smartcockpit.com/pdf/plane/boeing/MD-11/systems/0010/ and search for "not allowed" there will come up a lot of answers and a good way down there even pops up something about the IRU.Good luck solving your problem.Manfred

[tantonovich 5]

I know that this issue is almost always due to human error, however I just had this happen to me... and I'm perfect so it wasn't human error :-)

 

My situation somehow appears to have loaded with the GNS not functioning correctly.  So I had the same issue where I went to align my IRS using the "Initialize IRS" option on the CDU, and it returned a "NOT ALLOWED" error.  To fix, I selected REF on the CDU, then POS REF (LSK4L), then cycle the GNS Inhibit option (press LSK5R to inhibit, then again to Enable).  After this, I went back to the INIT page and was able to Initialize IRS successfully. 

 

Hope this helps!

[alex 12]

It helped! (I'm a late comer to the MD11 and I just had this problem today)

 

Thank you for posting this!