As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND A CABIN SMOKE WARNING MESSAGE ON THE DISPLAY UNIT. PERFORMED A CARGO SMOKE TEST AND VERIFIED ONE SMOKE DETECTOR IN THE MAIN CARGO BS 1541 FAULTY. REPLACED THE SMOKE DETECTOR IAW AMM 26-15-08-000-801, REV 90.05. PERFORMED AN OPS TEST, TESTED GOOD.