As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINEERING REPORTS SATCOM NOT SENDING DATA. ACFT GROUNDED. CONDUCTED SUCCESSFUL SATCOM COMMUNICATION TEST USING SATCOM-1 & SATCOM-2. CONTACTED SEA DISPATCH - RECEIVE & TRANSMIT BOTH SATISFACTORY. SATCOM BITE ALL PARAMETERS INCLUDING ACARS DATA LINK "OK". SATCOM IN PROG THEN LINK TEST SUCCESSFUL DISPLAYED IN LINK STATUS DURING ACARS INTERFACE TEST.