As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OCEANIC CPDLC SLOWLY DEGRADED BECOMING SATCOM FULLY DYSFUNCTIONAL. GROUNDED - YES. PERFORMED GOOD OPERATIONAL TEST OF SATELLITE COMMUNICATION (SATCOM) SYSTEM SAT-1 AND SAT-2 REF B737-9 AMM 23-15-00-710-801. PERFORMED GOOD CPDLC FUNCTIONAL TEST REF AMM 34-61-00-720-899. T