As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - FIRE SYS FAULT STATUS MESSAGE. PLACED ON MEL 26-00-1. RETURNED TO SERVICE. 2/5 MDC SHOWS NO CURRENT FAULT. FAULT HISTORY SHOWS FIRE EX CONTROL UNIT O/P DISCRETE ENG BLT 1. COMPLIED WITH FIM TASK 26-10-01-810-808-A01. SYSTEM TEST GOOD. CLEAR MEL. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.