What was found
FLT#827, BOS-TPA. 'FLIGHT ATTENDANTS REPORT A "BURNT CRAYON SMELL" THROUGH ENTIRE CABIN ON DECENT; NOTE: NO MX-270 INFO AVAILABLE C/W INFO NOTICE 2017-1015J FOUND EVIDENCE OF OIL CONTAMINATION AT AOU INLET/LOAD COMPRESSOR AREA. NO EVIDENCE OF OIL ON APU EXT/COMPARTMENT AREA AND EXT FUSELAGE. CORRECTIVE ACTION TYPE 1 (APU CAUSE OF ODOR) C/W LEVEL"C" ECS DECONTAMINATION IAW AMM 21-00-00-615-804 RAN BOTH ENGINES NO ODOR NOTICED. APU PLACED ON MEL 49-10-01A.