As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SAT 1 TRANSMIT WEAK AND CUT OUT. NO SIDE TONE HEARD DURING TRANSMISIONS. GROUNDED - YES. REPLACED SATCOM RIT. OPS CHECK GOOD COMMUNICATION WITH DISPATCH 5X5. B737-800 AMM 23-15-00 ROTABLE PART VERIFIED BY QC . JOE FROM DISPATCH CONTACTED.3313235.