As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEVEL 3 CABIN SMOKE ALERT AT GATE WITH MX PRESENT, NUMEROUS INTERMITTENT. REPEAT WRITE UP. REMOVED & REPLACED MSC PER AMM 31-42-01-4-0. RAN APU & ENGINE SUPPLIED AIRLOAD SYSTEM CHECKS GOOD IN REF WITH JRH. INSPECTED & CLEANED CAC OF WATER REF SMP.