What was found
PRIOR TO DESCENT AFTER MANNUALLY USING ANTI-ICE CREW AND PASSENGERS NOTICED DISTINCT BURNING SMELL IN THE CABIN AND COCPIT ASSOCIATED WITH A WISP IN THE UPPER CABIN BRIEFLY AFTER IT DISSAPATED.-C/A-ACCOMPLISHED ETN-EM-72-034. NO SMOKE OR SMELL NOTED IN AIRCRAFT. PREFORMED INITIAL EVALUATION REF EMB FIM TASK 21-20-00-810-A AND EMB 145 AMM 21-51-03-210-801. CONFIRMED BURNING SMELL AND NOTICED AIR LEAK IN THE AREA OF PACK 2. FURTHER TROUBLESHOOTING REQUIRED. INSPECTED AND FOUND #1 PACK ACM SEIZED. DEFERRED PER MEL 21-30. PERFORMED TROUBLESHOOTING PER FIM 21-51-00 PERFORMED CMC DOWNLOAD PER AMM 45-45-00. NO RELATED MESSAGES. REMOVED AND REPLACED PACK #2 DUCT OVERTEMP SWITCH PER AMM 21-51-09. OPC GOOD. MEL RESTORED. ALL MTX ACTIONS C/W. ACCOMPLISHED ETN-EM-72-034. NO SMOKE OR SMELL NOTED IN AIRCRAFT.