As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN CABIN AFTER START, TROUBLESHOT TO RT PAC. SMOKE DISAPATES AFTER PAC HAS BEEN TURNED OFF. TROUBLESHOT SYSTEM, FOUND CABIN PAC FAILED. REMOVED AND REPLACED CABIN ACM IAW MM 21-51-00. SERVICED ACM IAW MM 12-10-01. ALL OPS AND LEAK CHECKS GOOD.