What was found
SMOKE IN THE COCKPIT AT 3000 FT RETURNED BACK TO ORF. IT APPEARS THAT PACK 1 IS INOP.-C/A-DEFERRED PACK 1 AS PER MEL 21-30. REQUIRES COMPLETION OF ETN-EM-72-034 FOR THE SMOKE/ODOR IN COCKPIT. COMPLETED ROLLS ROYCE ENGINE SUPLEMENT ETN-EM-72-034. NO SMOKE OR ODOR FOUND. PACK 1 REMAINS ON MEL. RAN ENGINES WITH CREW. INSTALLED PN FROM KVA PACK EXHAUST DUCT IAW EMB 140 AMM 21-51-02. OPS CHECKS FAILED. SUSPECT POSSIBLE ACM NOT TURNING OR DTCV FAIL. MEL REMAINS OPEN. PER ETN-EM-21-062 REMOVED AND REPLACED LH ACM IAW EO EM-2100-048. OPS CHECK AND LEAK CHECK GOOD.