As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOST SATCOM ON FLIGHT. UNABLE TO RESET THROUGH CENTER CDU. WITH NO WORKING HF'S HAD TO PULL CB'S TO RESET SYSTEM, SATCOM WORKING INTERMITTENT ON PLANE.(<P>REMOVED AND REPLACED LEFT AND RIGHT HF COUPLERS. PERFORMED OPS CHECK OF SATCOM IAW AMM 23-25-00. OPS CHECK GOOD. NO DEFECTS NOTED. PER ENGINERRING CONDUCTED L & R SATCOM VOICE CALLS. OPS CHECK GOOD.</P><P>OFF PART: PN 964-0453-001, SN 03249</P>)