737 IRS Fault codes
I had a strange IRS issue today - one of the IRS units would align, with no caution lights, but the MAP flag was displayed on the affected ND, and status code 09 was displayed with HDG/STS selected.
Eventually, after several realignments, it came to life of its own accord, but would be interested to know if anyone has a list of the IRS status messages for future rerence as both the FCOM and the MRG are silent on the matter.