What was found
REF LOG PAGE 11584611, FVR FAILED DUE TO BOTH HF RADIOS LOW END INOPERATIVE. ACFT GROUNDED. REF TSR817982: CLEANED AND RESEALED COUPLER TRAY AND ANTENNA BONDING POINTS. ACCOMPLISHED HF 1 AND HF 2 OPS AND SYSTEM TEST, REF AMM 23-11-00-710-801 AND AMM 23-11-00-730-801. OPS NORMAL. HF 1 AND 2 SUCCESSFUL 2 WAY COMMUNICATION WITH SFO ON FREQUENCY 11.342 FROM SEAT AC SOUTH RUN-UP. BOTH ACARS HFDR MAINTENANCE PAGE 2 SHOW: PANEL, FREQUENCIES WITH NO COUPLER FAULTS, AND TUNING AND SIDETONE HEARD FROM 3.000 TO 29.000.