As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - AIR TURN BACK - FLT 932 - PRIOR TO ETOPS ENTRY CREW REPORTED, WAS UNABLE TO TRANSMIT ON THE LEFT HF AT ALL STATIONS. AIRCRAFT RETURNED TO PHX AND LANDED WITHOUT FURTHER EVENT. MAINTENANCE REMOVED AND REPLACED THE LT HF RT. OPERATIONAL CHECKS WERE GOOD. VENDOR CONFIRMED FAILURE DUE TO BEING OUT OF CALIBRATION. THE UNIT WAS REPAIRED AND TESTED IAW CMM 23-10-70 REV.6