As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSING FL 220 WE GOT A RT ICE PROT TEMP HIGH LIGHT WE CLOSED THE RT CROSSFEED VALVE THEN GOT A RT AIR COND TEMP HILIGHT FOLLOWED BY SMOKE IN THE CABIN AND COCKPIT FOLLOWED CK LIST SMOKE STOPPED. FOUND APU OIL LEAKING INTO APU INLET C/W OPN 5088 UNABLE TO FIND SOURCE OF APU OIL LEAK UNABLE TO CLEAN APU INLET THIS STA T/S PACK SYS RAN ADJUST/TEST AND AUGMENTATION VALVE CK PER M/M AND PFHB ALL CKS NORMAL. APU FWD TO MCO/PLAC FOR OIL CONTAMINATION.