What was found
ELECTRIC TRU 4 & MULTIPLE ASSOCIATED EICAS STATUS MSGS. REFERENCING ITEMS 1 - 9, FOUND TO BE CORRELATED TO POPPED CB C856, WHEN RESET ALL ITEMS CLEARED. AS PRECAUTION REPLACED CB C856 AS WELL AS TRU 4. ALL OPERATIONAL CHECKS NORMAL IAW TASK 24-32-01, AMM 33-11-00, AMM 30-41-00, AMM 30-32-00, AMM 24-32-01, AMM 77-31-00 & AMM 30-40-00.