As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 INU BECAME COMPLETELY UNREADABLE AFTER ONE HOUR OF FLIGHT, IT HAD DEVIATED MORE THAN 10 MILES RIGHT OF TRACK. TWO HOURS INTO FLIGHT IT WAS MORE THAN 100 MILES OFF ACTUAL AIRCRAFT POSITION AS ESTABLISHED WITH VOR OVERHEAD. REMOVED AND REPLACED INU P/N 463001-6130-0413.OPS CHECKED GOOD, OK FOR CONTINUED SERVICE.