As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4402 - LAVATORY SMOKE WARNING CAME ON DURING TAXI AND WENT OUT. INSPECTED CUSTOMER SERVICE MANIFOLD ON LEFT ENGINE AND FOUND HIGH STAGE BLEED TUBE CRACKED. REPLACED BLEED TUBE. PERFORMED FUNCTIONAL TEST FLIGHT AND PASSED. OPERATIONAL TEST OF SMOKE DETECTOR GOOD. AIRCRAFT RETURNED TO SERVICE. (M)