As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO TRANSMIT ON EITHER SATCOM. TRIED FROM BOTH RADIO SELECTOR PANELS. CONNECTED AND RCVD FINE. GROUNDED - YES. ON DEFERRAL. UNABLE TO DUPLICATE DEFECT. PERFORMED SATCOM ADJUSTMENT/TEST PER AMM 23-15-00-730-801 - ALL TESTS PASS FOR SAT-1 AND SAT-2. CLEARS MEL 23-18.