What was found
ON ARRIVING AT AIRCRAFT FO & CAPTAIN SMELLED A BURNING ODOR COMING FROM AC VENT OVER GALLEY WITH MINUITES APU AUTO SHUTDOWN WITH FAULT. CONFIRMED APU INLET OIL CONTAMINATION. CLEANED APU INLET PER AMDS 4900-1845. ALSO FOUND DOOR SW DAMAGED. R/R SW PER IPC 49-51 . CLEANED FUSELAGE FROM WINGS TO TAIL. 886913 NEEDS FULL DUCT BURN. C/W FULL DUCT BURN PER MD90 AMM 21-53 C/W NO GO ODI ATA 2172 R/R COALESCE BAGS PER MD90 AMM 21-54.