As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF SMOKE OR BURNING SMELL IN CABIN DETECTED. CREW DECLARED AN EMERGENCY AND RETURNED TO BOG WITHOUT FURTHER INCIDENT. TIGHTENED SEVERAL PNEUMATIC DUCT CLAMPS. SWAPPED MINIMUM EQUIPMENT BAY DETECTOR WITH ZONE 125 DETECTOR. HISTORY OF HOT FLOORS AND LEAKS AND APU BLEED ON MEL. SYSTEM LEAK AND OPS CHECK NORMAL. (M)