As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH FIRE WARNING MASTER LIGHTS ON FORWARD GLARESHIELD ILLUMINATED TWICE FOR ABOUT 1 SECOND EACH TIME DURING CRUISE AT F270. MOMENTARY BELL WITH EACH ILLUMINATION. NO OTHER WARNINGS AND ALL ENGINE INSTRUMENTS NORMAL. FIRE TEST IN BOTH LOOPS OK BOTH INFIGHT AND ON GROUND. PERFORMED FIRE WARNING DETECTOR SYSTEM TEST PER MM 26-11-000-05. OPS CK NORMAL. ALSO INSPECTED E&E COMPARTMENT FOR SECURITY OF ENG FIRE PROTECTION CONTROLLER. FOUND OK. NO HISTORY FOR LAST 90 DAYS. OK FOR SERVICE.