What was found
EN ROUTE FROM BHM TO LGA, SMOKE IN CABIN WITH APU OFF AND BOTH PACKS RUNNING ON 10TH STAGE BLEED AIR. EMERGENCY DECLARED, A/C RETURNED TO BHM LANDED SAFELY. TRANSFERRED TO DEFERRED LIST PER MEL 21-51-01-2.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
EN ROUTE FROM BHM TO LGA, SMOKE IN CABIN WITH APU OFF AND BOTH PACKS RUNNING ON 10TH STAGE BLEED AIR. EMERGENCY DECLARED, A/C RETURNED TO BHM LANDED SAFELY. TRANSFERRED TO DEFERRED LIST PER MEL 21-51-01-2.