As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROX ONE TO TWO MINUTES AFTER TAKEOFF, FLIGHT ATTENDANTS REPORTED SMOKE IN CABIN. BOTH SMOKE DETECTORS IN REAR OF AIRCRAFT ACTIVATED. CHECKED APU INLET FOUND CLEAR. PERFORMED DUCT BURNOUT PER M/M 36-10-00-5. NO SMOKE IN CABIN ON RUN-UP. OK FOR SERVICE.