What was found
AFTER APU START CABIN FILLED UP WITH ENVIROMENTAL SMOKE. REMOVED AND REPLACED FWD (CABIN) ACM WITH REPAIRED UNIT AND SERVICED WITH OIL. IAW MM 21-51-00.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER APU START CABIN FILLED UP WITH ENVIROMENTAL SMOKE. REMOVED AND REPLACED FWD (CABIN) ACM WITH REPAIRED UNIT AND SERVICED WITH OIL. IAW MM 21-51-00.