As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO TRANSMIT ON HF #2. RECEIVES FINE INCLUDING SELCAL. IT ALSO HAS A VERY LONG TUNING TONE. GROUNDED - YES. REPLACED #2 COUPLER REF B737-900 AMM 23-11-61. REQ INSTALLATION TEST 24716. HF #2 TUNES BUT WAS UNABLE TO MAKE VOICE CONTACT ON THE GROUND IN ANC. PER SEAMC MIKE, MEL 23-11A CLEARED. SEE LOGPAGE 60431881 FOR FVR FLIGHT REQUIRED.