As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - TRANSMISSION ON RT HF IS INTERMITTENT AND NO SIDE TONE AT ALL STATIONS. TROUBLESHOT IAW FIM 23-11-00. VERIFIED VOICE. SIDE TONE, AND DATA OPERATIONS. ALL OK. PERFORMED BITE RT HF TRANCEIVER IAW 23-12 FIM. NO FAULTS EXIST.