As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF RADIO #2 WILL NOT TRANSMIT WHEN TUNING, THE TUNING TONE IS VERY LONG (10-15 SECONDS) AND ABOUT HALF THE TIME NUMEROUS HF FREQUENCIES IT FAILED TO TUNE AT ALL. WE WERE ABLE TO RECEIVE A GOOD SELCAL CHECK ON HF2 BUT UNABLE TO TRANSMIT FROM EITHER CA OR FO SIDE. WE WERE ABLE TO RECEIVE ON HF2 ALSO. GROUNDED - YES. REPLACED #2 HF - TRANSCEIVER IAW B737-900 AMM 23-11-21-400-801. GROUND VERIFICATION CHECK NORMAL. AIRCRAFT OK FOR SERVICE.