As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH VHF NAV 1 & 2 WOULD NOT RECEIVE. NO IDENTS OR NEEDLES. DME DISPLAYED WITHOUT IDENT. ON RETURN TO PDX DURING DESCENT BELOW 20,000' BOTH VHF NAVS BEGAN TO RECEIVE AND DISPLAY BTG WITH VERY FAINT IDENT. LANDING WEIGHT LESS THAN #62000. REMOVED AND REPLACED LT AND RT VOR/LOC ANTENNAS IAW MTC 6345102. OPS CHECK GOOD. A/C REMAINS CAT III QUALIFIED, PLACARD READS CAT III.