As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 509 - EN ROUTE BOS-ORD, AFTER TAKEOFF THERE WAS SMOKE IN THE CABIN, THEN IN COCKPIT. DECLARED EMERGENCY. SMOKE STAYED. RETURNED BOS AND LANDED WITHOUT INCIDENT. TIGHTENED BOLT ON APU MASTER CHIP DETECTOR. PERFORMED COMPLETE PACK BURN. REPLACED COALESCER BAGS AND ACCOMPLISHED PACK BURN. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)