What was found
SATCOM EICAS MSG AND 2 STATUS MSGS AFTER ALIGNMENT. RESET CB'S, FOLLOWED FIM FOR MSG 2368893 & 2360031, NO FAULTS. LOGGED ON AND PASSED MAT GROUND TEST. USING AHM FOUND MSG 2360061 SEVERAL TIMES, IAW FIM TASK 23-15 804 LGA HPA NEEDS TO BE REPLACED. OUT OF STOCK LAXJL. FOUND MSG23-68893 ACTIVE. IAW FIM SUSPECT SDU M23106. REPLACED SDU IAW MM. COMPLETED OPS CHECK BY CALLING SMC. 2 SEGMENTS LATER RCV'D EICAS MESSAGES SATCOM SYS AND SATCOM HGA DISPLAYED. TRIED CBS RESET P110 E17 E20 & E21,NO HELP. NEEDS MORE TIME FOR TROUBLESHOOTING. REACTIVATED SATCOM SYS AND IT LOGGED NORMALLY. GROUND TEST ACCOMPLISHED AND IT PASSED.