As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED AN "ENG 1 AND ENG 2 FIRE EXT BOTTLE B FAIL" MESSAGE ON EICAS. THE TEMP COMPENSATED PRESSURE SWITCH ASSY ON THE FIRE BOTTLE FAILED THE OPS TEST. SUSPECTED PRESSURE SWITCH ASSY TO BE CAUSE OF FAULT. FIRE BOTTLE ASSY REPLACED.