What was found
FLIGHT ATN3454 STRONG SMOKE ODOR IMMEDIATELY AFTER TAKE OFF. AIR TURN BACK TO DEPARTURE STATION-KILN. AIRCRAFT GROUNDED FOR UNSCHEDULED MAINTENACE AND CONDITIONAL INSPECTION REQUIREMENTS. PERFORMED ENG RUNS. ISOLATED ENG/APU AIR TO EACH PAC. FAULT NOT DUPLICATED IAW B767 AMM 21-00-21 PARA STEP 9. NO SMELLS /FUMES NOTED AT CONDITIONAL INSPECTION. REMOVED, INSPECTED, CLEANED & REINSTALLED LH PACK COMPONENTS IAW B767 AMM 21-00-21 PARA C STEP 10 TO COMPLETION. NO OIL CONTAMINATION NOTED. CONDITIONAL INSPECTION RESULTS ARE NORMAL. NO FINDINGS NOTED. AIRCRAFT RELEASED TO SERVICE ETOPS 180.