As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 0487 - AFTER TAKEOFF EN ROUTE BOS/MIA - CREW NOTED VISIBLE SMOKE IN CABIN. SMOKE WAS CLEARLY VISIBLE AS THICK AS FOG, DECLARED AN EMERGENCY AND AIR INTERRUPTED. LANDED BOS WITHOUT INCIDENT. REPLACED APU DUE TO LEAKING OIL. REPLACED BOTH COALESCER BAGS PER MM. ACCOMPLISHED APU BURN-OUT. SYSTEM GROUND CHECKED NORMAL. (X)