As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ATTEMPTING TO DO T/C CMPT-23E0-13295- NEW SATCOM TRANSCEIVER WOULD NOT LINK WITH ACARS DATA. ACFT GROUNDED. TRIED 2 NEW RECEIVERS WITH SAME RESULT. SUSPECT TRANSCEIVERS NOT ACTIVATED. INSTALLED ORIGINAL SATCOM TRANSCEIVER & TESTED NORMAL REF AMM 23-15-00-400-801 & 23-15-00-730-801.