As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CARGO SMOKE ALARM NR 4 ILLUMINATED WITH ASSOCIATED BELL .WENT OUT 2 MIN AFTER ILLUMINATION , NO OTHER INDICATIONS OF FIRE WERE PRESENT. REMOVED AND REPLACED THE NR 4 SMOKE DETECTOR PER B727-200 MM 26-16-001-4, OPS CHECK GOOD, OK FOR SERVICE. *S/D* REMOVED AND REPLACED THE NR 4 SMOKE DETECTOR PER B727-200 M/M 26-16-001-4. OP'S CHECK GOOD OK FOR SERVICE.