As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NO SIDE TONE TRANSMITTING ON HF 2 FROM EITHER CONTROL HEAD. SELCAL CHECK RECEIVES OK ON BOTH HF 1 & 2. RECEPTION OK ON BOTH HF 1 & 2. ACFT GROUNDED. PERFORMED HF SYS BITE PROCEDURE FIM 23-11-00-810-801. OPS CHECKED NORMAL. GROUND VERIFICATION OF HF 2 TRANSMIT CHECKED NORMAL. OK TO CONTINUE.