What was found
DIV - ON CLIMBOUT FAS ALERTED US TO ACRID SMELL COMING FROM THE AFT VENTS. DIVERTED TO PHNL. PER AIR CONTAMINATION FORM, SMELL OCCURED DURING PACK 1 OPERATION AND WAS SMELT PRIMARILY IN AFT CABIN. PERFORMED PRECAUTIONARY INSPECTION AT PACK 1 DUCTING, MIXER UNIT + DUCTING, AND PACK COMPONENTS. NO DEFECTS NOTED. ENGINE OIL LEVELS AT BLOCK IN WERE 17.2 AND 17.5, AND PERFORMED INSPECTION AT #1 ENGINE PER TSM 71-00-81-810-805-A FOR LEAKS. PERFORMED ENGINE IDLE RUNS AT #1 AND #2 ENGINES - COULD NOT DUPLICATE SMELL DURING RUN UPS. NEED TO CONTINUE INSPECTIONS AT AFT AIRCRAFT ELECTRICAL SYSTEMS FOR MALFUNCTIONS/ODORS. COULD NOT FIND ANY DEFECTS IN AFT AREA/ELECTRICAL SYSTEMS. OK FOR SERVICE