As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 HF RADIO INOP. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 23-11 TASK 806 COULD NOT CONTACT SFO-AIINC. REMOVED #2 HF XVR AND PLACED ON SOS PER B737-800 AMM 23-11-21-000-801. INSTALLED #2 HF XVR PER AMM 23-11-21-400-801. PERFORMED INSTALLATION TEST PER AMM SUBTASK 23-11-21-800-001 TEST IS GOOD. PERFORMED HF #2 SYSTEM TEST PER AMM 23-11-00-730-801 #2 HF SYSTEM TEST IS GOOD. A/C RELEASED FROM MEL 23-11A.