As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING OUT OF MEM, THE IRS NAV 1 LIGHT CAME ON. THE AP DISCONNECTED. CAPTAINS INST PFD RED ATT, ND RED HDG. FGS ADVISORY PANEL YD 1. C/W NON NORMAL CHECKLIST 7.10.3 POM. SELECT ATT HDG SWITCH TO BOTH 2. REVIEWED AND CLEARED FGC FAULTS AND PERFORMED FAULT ISOLATION PROCEDUE. ALL RTS TEST PASSED AND BOTH IRS CHECK GOOD. UNABLE TO DUPLICATE DISCREPANCY. OPS TEST GOOD IAW AMM 34-20-00.