As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCI - FLT 815 - AFTER DEPARTURE, FORWARD LAV SMOKE DETECTOR ALARM SOUNDED. AIRCRAFT RETURNED TO MCI WITH NO EMERGENCY DECLARED. FOUND BLEED AIR DISTRIBUTION DUCTING CLAMP IN AFT CARGO AREA LEAKING. REPLACED CLAMP. OPERATIONAL CHECK OF ENGINES/APU AND A/C PACKS NORMAL. (M)