What was found
AIRCRAFT WAS GROUNDED: JUST AFTER TAKE OFF WHEN CLIMB POWER WAS SELECTED, A VERY STRONG OILY ODOR WAS DETECTED IN COCKPIT & CABIN. ODOR CLEARED WHILE CLIMBING THROUGH 1800 FT. ACCOMPLISHED SMOKE ODOR FUME INITIAL CARD 26L00021001. FOUND NO LEAKS ON NEW APU. VERY FAINT SMELL OMITTED FROM PACK 1 ONLY WITH ALL ENGINES. PACK 2 HAS NO SMELL FROM ANY OF THE THREE ENGINES. DETERMINED PACK 1 CONTAMINATION FROM PREVIOUS EVENT. ACCOMPLISHED DECONTAMINATION PHASE 2 PER JOB CARD 26L00021004. NO SMELLS NOTED FROM PACK 1.