What was found
FUME SMELL IN ACFT CABIN AFTER TAKEOFF. STARTED APU & SELECTED APU BLEED. FUMES WENT AWAY, FAINT DIRTY SOCK SMELL. REMOVED BOTH ENG SPINNERS & INSPECTED FOR OIL, NONE NOTED. REINSTALLED SPINNERS IAW AMM 72-21-00. FOUND APU INLET SEAL INSTALLED UPSIDE DOWN, REMOVED & REINSTALLED TO CORRECT POSITION. FOUND APU OVER SERVICED, SERVICED TO PROPER LEVEL. ACCOMPLISHED JOB CARD 26L00021001. NO FAULTS NOTED, AIRCRAFT OK FOR SERVICE.