As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF: LOG PAGE 362049; TWICE DURING CRUISE, MOMENTARY ILLUMINATION OF MASTER WARNING LIGHTS WITH ASSOCIATED FIRE WARNING BELL. NO EICAS MESSAGE. ACCOMPLISHED CMC GROUND TEST FIRE PROTECTION SYSTEM. (TEST PASS) NO FAULTS IN CMC FAULT HISTORY, MM26-10-00. (K)