As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF #1 FAIL MESSAGE ON BOTH ACP'S. GROUNDED - YES. VERIFIED FAULT, ACCOMP. BITE TEST OF #1 HF TRANSCEIVER NO FAULTS BITE TEST PASS. FAIL MESSAGE NO LONGER SHOWS. REF. B737-900 AMM 23-11-00-710-801 ACCOMP. TEST WITH SFO COMM TEST PASSES REF. AMM 23-11-00-730-001.