What was found
SATCOM INTERMITTENTLY FAILED. ON PG2 OF SAT-PHONE IN MCDU THE BITE PROMPT OCCASIONALLY DISPLAYS FAIL. SAT BITE STATUS SHOWS LBT-2 FAIL AT SAME TIME AS BITE CHANGES FROM OK TO FAIL. CAN MAKE SATCOM CALLS BUT UNABLE TO RECEIVE CALLS FROM DISPATCH. ACFT GROUNDED. COMFIRMED LBT-2 FAIL, BITE FAIL, AND LBT-2 SIM BLANK. REMOVED CIM IAW AMM 23-15-00-400-802. CLEANED & INSPECTED CONNECTOR. REMOVED SIM CARDS. CLEANED SIM CARDS AND CIM. INSTALLED SIM TO ORIGINAL LOCATION. REINSTALLED CIM IAW AMM 23-15-00. LBT-A ND LBT-2 READING NORMAL ON MCDU. LBRT-2 SIM SHOWING DATA. INCOMING CALLS RECEIVED NORMAL.