As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT FROM KBWI THE NR 1 AND NR 2 HF SYSTEM FAILED. THE CREW DID ALL NECESSARY PROCEDURES AND RETURNED TO KBWI LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE NR 1 AND NR 2 HF SYSTEM, RESEATED THE NR 1 HF SYSTEM OPERATIONAL CHECK GOOD. REPLACED NR 2 HF ACC COUPLER OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.