Approach button for autoland causing f/o PFD to go blank and to cut autopilot, master caution showing IRS.

Question

So when I'm on approach for an airport with LNAV and VNAV active and i hit the final STAR i go to click my APP button to begin following the G/S. When i do this in around 2 seconds the cockpit lights fade and the autopilot turns off and the master caution light shows IRS. During this time the F/O displays turn off.

*NOTE*

During set up the IRS was aligned and the position was set to current.

AIRCRAFT - Zibo Mod 737-800

Answer 1

Hi - Does this happen with the default 737 as well?

Comments

Not sure as I only fly with the Zibo but i can try it and see.