As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVE ONLY ON SAT-COM. NO XMIT ON ONE OR TWO BOTH CALLS OUT AND RECEIVED. GROUNDED - YES. ACCOMPLISHED SATCOM COMMUNICATION SYSTEM VOICE TEST ON BOTH SAT COM 1 AND 2. REFERENCE AMM 23-15-00. TRANSMIT AND RECEIVE VOICE QUALITY NORMAL AND CLEAR. NO HISTORY 30 DAYS. CLEARS MEL 23-18.