As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF2 FAIL IN ACTIVE & STANDBY WINDOWS. GROUNDED - YES. ACCOMPLISHED RTP B737-900 FIM 23-12 TASK 815, AND HF COMM BITE REF FIM 23-11 TASK 801 NO FAULTS LOGGED ON NR 1 OR 2 HF TRANSCEIVERS, COMM CHECK WITH SFO BY CREW OPS NORMAL. ALL GROUND TESTS PASSED.