As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF2 SHOWS "FAIL" IN COMM HEAD. GROUNDED - YES. 2ND WRITE UP IN TWO DAYS. SYSTEM HAS BEEN RESET BUT AS PRECAUTIONARY REMOVED AND REPLACED HF #2 TRANSCEIVER IAW B737-800 AMM 23-11-21-000-810 AND AMM 23-11-21-400-801. ETOPS GROUND VERIFICATION GOOD IAW AMM 23-11-00-710-801,