What was found
AFTER TURNING ON APU & PACKS SMOKE IN CABIN SET OFF SMOKE ALARMS. ACM FAILURE, POSSIBLE BEARING FROZEN. REPLACED ACM, OPS CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER TURNING ON APU & PACKS SMOKE IN CABIN SET OFF SMOKE ALARMS. ACM FAILURE, POSSIBLE BEARING FROZEN. REPLACED ACM, OPS CHECK GOOD.