As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO TUNE AND TRANSMIT HF NR 1 WHILE INFLIGHT BOTH HF RADIOS TESTED NORMAL ON GROUND. WE CAN HEAR STATIC ON HF NR 1 BUT CANNOT TRANSMIT DURING FLIGHT HF NR 2 WORKS NORMAL. GROUNDED - YES. PERFORMED BITE CHECK OF NR 1 HF COMM SYSTEM PER FIM 23-11 TASK 801 WITH NO FAULTS NOTED GROUND TUNING CHECK OK. A/C OK FOR RETURN TO SVC.