As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, PDX HAD LINE THROUGH 110.5. RECEIVED GOOD ID ON FREQ BUT LINE NEEDLE LT AND 110.5 DISAPPEARED INSTEAD OF LOCATED ID IJMJ. ACFT GROUNDED. PERFORMED DFCS FAULT HISTORY TEST LEG 1 (FMC DATA INVALID). PERFORMED FMC OPS TEST IAW 34-61-00. OPS CHECKED GOOD. OK FOR CONTINUED SERVICE.