What was found
UNABLE TO TRANSMIT ON EITHER HF RADIO, TRIED MULTIPLE HF FREQUENCIES. WHEN TRANSMITTING, CONTINUOUS SIDE TONE. RECEIVED HF OK. ACFT GROUNDED. TRIED HEADSET AND MICROPHONE AT FACE OF BOTH HF R/TS. ABLE TO RECEIVE, UNABLE TO TRANSMIT BOTH SIDES. REMOVED BOTH HF COUPLERS. ACCOMPLISHED AND FEED LINE TO ATTACH PLATE RESISTANCE CHECK, 28 MILLIOHMS, REF AMM 55-33-11/400. REINSTALLED AND SECURED NR 2 HF COUPLER, REF AMM 23-11-61/400. REINSTALLED AND SECURED NR 1 HF COUPLER, REF AMM 23-11-61/400. R & R 1 COUPLER, REF AMM 23-11-61-401. NO HELP. FOUND CONNECTORS D8823P AND D8517P SWAPPED ON E8-1 SHELF. PUT BOTH CONNECTORS TO CORRECT POSITION, REF WDM 23-11-11 AND 23-11-21. FOUND NR 2 COUPLER TO BE CAUSING NR 1 COUPLER TO FAULT. R & R 2 HF COUPLER, REF AMM 23-11-61-401. OPS CHECK OF NR 1 AND NR 2 HF SYS NORMAL.