What was found
FLT 1080 CLT-JFK UPON CLIMBOUT - NOTICED A SLIGHT SMOKE IN CABIN AND COCKPIT WHICH FOLLOWED BY A PACK 2 FAIL EICAS MESSAGE. PACK DID A SUCCESSFUL RESET UPON DESCENT, PACK 2 FAIL MESSAGE REOCCURRED AND DID NOT RESET (CONTINUED), LANDED W/O FURTHER INCIDENT W/PACK SELECTED OFF. REMOVED AND REPLACED ACM PER AMM 21-51-05-801-A AND 21-51-05-400-801-A. REMOVED AND REPLACED LOW LIMIT BYPASS VALVE PER AMM 21-51-06-600. OPS CHECK PER AMM 21-51-00-710-801-A/500. OP CHECK GOOD. OK FOR SERVICE. REPLACED FISH OUTLET DUCT FOUND DAMAGED DURING REMOVAL.