As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCI - FLT 667 - DURING CLIMB WHEN ENGINE ANTI-ICE WAS TURNED ON, A BURNING ODOR WAS NOTICED IN THE CABIN. TURNED OFF ENGINE ANTI-ICE. FOUND DIRTY COALESCER, MFG PN 21D10-1. REPLACED BOTH COALESCERS. AIR CONDITIONING SYSTEM THEN CHECKED NORMAL. OP-16 - 2-16-96 - TUS.