As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAN NOT TRANSMIT ON HFI. ACFT GROUNDED. NO KEYLINE WHEN MIC IS KEYED. TRIED FROM FRONT OF NR 1 TRANSCEIVER AND SAME RESULT. REPLACED HF NR 1 TRANSCEIVER IAW AMM 23-11-21-000-801 AND 23-11-21-400-801. GROUND FUNCTIONAL CHECKED GOOD IAW AMM 23-11-21-400-801.