As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH SAT PHONES INOPERATIVE. NO VOICE HEARD AND NO SIDE TONE WHEN TRANSMITTING TO STATION. RECEIVING STATION GOT OUR CALL AND HEARD US. WE COULDN'T HEAR THEM. ACFT GROUNDED. PERFORMED OPS TEST OF BOTH SAT PHONES, OPS TEST NORMAL, REF AMM 23-15-00. NO HISTORY 60 DAYS. THIS CLEARS MEL 23-18, PLC C/N 0901013 REMOVED.