What was found
OUTBOUND CREW SMELLED OIL IN COCKPIT. PREVIOUS REPORT OF SMOKE AND SMELL IN CABIN AND COCKPIT ON FLIGHT 918-12. *S/D* APU (S/N 1059) (P/N 3800550-1) WAS REMOVED FROM A/C 2069 ON 4/23/99. APU HAD SUFFERED SEVERE ENGINE COMPRESSOR DAMAGE DUE TO SOFT (ICE) FOD. THE DAMAGE WAS EXTENSIVE. THE RESULTING EFFECT OF THE DAMAGE WAS LEAKAGE OF OIL PAST THE ENGINE COMPRESSOR SEAL ALLOWING OIL INTO THE BLEED AIR.