As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATB - DUE TO INABILITY TO COMMUNICATE ON BOTH HF RADIOS WITH ATSU MEL'D. REMOVED AND REPLACED 1HF ( 1RE1 ) XSCVR PER AMM 23-1133 PB 401 BITE AND OPS CHECK GOOD @ THIS TIME. AFTER 1HF XSCVR REPLACEMENT, HF1 & HF2 & SELCAL OPS CHECK GOOD CALL-OUT& RECEIVE TRASMISSIONS. A/C OK FOR SVC.