EFIS MISCOMP

[FYG001]

On a recent flight into ELLX I had an 'EFIS MISCOMP HDG', with the left rose being approx 15 degrees off when on the LOC. for RWY 06

It is impressive that Hotstart simulates this. 

The FCOM 1 advizes the following with this message:

(1) Flight instruments and Integrated Standby Instrument..........................Cross-check

(2) Reversionary panel, IRS switch.......................................... Select to reliable alternate source.

As I was visual I continued the APP so I did not get round to switching to teh reliable source, but I would not be surprise if Hotstart had also this correctly modelled

[ois650]

Everything is modelled, so using the QRH/FCOM to troubleshoot is the way to do it. 

[FYG001]

Incredible!