As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF 2 SHOWS FAIL ON BOTH ACTIVE AND STANDBY WINDOWS. FREQUENCY DISPLAYS WHEN PUSHED TRANSFER BUTTON BUT FAIL RETURNS ALMOST IMMEDIATELY. ACFT GROUNDED. CYCLED BOTH HF COMMS CIRCUIT BREAKERS AND ACCOMPLISHED HF COMMS BITE PROCEDURES IAW FIM 23-11 TASK 801, BOTH HF OPS CHECKED GOOD. NO EXISTING FAULT, OPS CHECKED OK.