What was found
NR 1 HF UNABLE TO TRANSMIT/RECEIVE. REPORTS 4/5 SIGNAL BUT VOICE TOTALLY GARBLED. WE COULD NOT RECEIVE EITHER ON NR 1HF. NR 2 HF TESTED IN COMPARISON WAS 5/5, OPS NORMAL. TRANSMIT AND RECEIVE SAME GEOGRAPHIC LOCALE. GROUNDED - YES. REF HF SYSTEM/OPS TEST AMM 23-11-00-501. VOICE COMM TESTS ON HF-1 WAS UNSUCCESSFUL, NO TRANSMIT OR RECEIVE CONFIRMED. HF-2 WAS FAINT. BOTH HF 1 AND 2 ATOMIC CLOCK WAS HEARD VIA FREQUENCY 5000 AND NOTHING MORE. REMOVED AND REPLACED HF-1 TRANSCEIVER, REF AMM 23-11-21-000801. VOICE COMM TEST SUCCESSFUL. ESTABLISHED LOUD AND CLEAR TRANSMIT/RECEIVE 2/2, 3/3 WITH SFO. GROUND VERIFICATION CONFIRMED.