What was found
DURING SMOKE DETECTION CHECK APPEARS MESSAGE "AC6781 FALSE ALARM" ON CDU. R&R SMOKE DETECTOR UNIT IAW MM26-15-05. TESTED SMOKE DETECTION SYSTEM OK NOW.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING SMOKE DETECTION CHECK APPEARS MESSAGE "AC6781 FALSE ALARM" ON CDU. R&R SMOKE DETECTOR UNIT IAW MM26-15-05. TESTED SMOKE DETECTION SYSTEM OK NOW.