What was found
ELECTRICAL BURNING SMELL FOR 10-15 MINUTES BEFORE AND AFTER PACK 1 FAILED 2X DURING DESCENT. EVENTUALLY WENT AWAY. NO ALERTS/ MESSAGES. REF AML 110400019/1 PACK 1 PLACED ON DEFERRAL MEL 21-44 AUTH# 100906D-C FOLLOWED FIM TASK 21-20-00-810-801-A. FOUND SOURCE OF ODOR TO BE FAILURE OF AIR CYCLE MACHINE PACK 1. AFTER CUTTING OUT PACK 1 AND USING ONLY PACK 2 BURING SMELL WENT AWAY. RAN PACK 2 ONLY FOR 30 MIN. NO FURTHER DEFECTS NOTED. AC OK FOR SERVICE