As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENCOUNTER ICE ON DESCENT INTO CVG. TURNED ON AIRFOIL ANTI- ICE. NOTICED SMOKY SMELL IN THE CABIN. LT PACK TRIPPED ON SHORT FINAL. PACKS TURNED OFF ON LANDING AND SMOKE WENT AWAY. FOUND APU TURBINE CASE CRACKED. REPLACED APU. UPON APU RUN, NO AIR. REPLACED SURGE VLV, AIR NOW OK. PERFORMED DUCT BURNOUT, CKS GOOD.