What was found
A/C GROUNDED DUE TO EVENT REF LP1238969, ITEM 1 : FUMES IN AFT CABIN. PERFORMED THROUBLESHOOTING OF SMOKE AND OR OIL SMELL IN CABIN TSM 71-00-00-810-892-A, NO DEFECTS NOTED THROUGH ALL STEPS. PERFORMED LEVEL B REMOVAL OF THE CONTAMINATION OF THE ENVIROMENTAL CONTROL SYSTEM. NO FUMES, SMOKE OR ODOR NOTED AFTERWARDS. A/C OKAY FOR SERVICE. AMM 21-00-00-615-803-A. PERFORMED TSM 05-50-00-810-831-A, IDENTIFICATION OF THE CAUSE OF CABIN ODOR.