As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MSP - EWR ON CLIMBOUT THRU APPROX 14000 TO APPROX 24000 AN ACRID BURNING SMELL THOUGHT TO BE COMING FROM THE PACKS - COULD NOT ISOLATE WHICH PACK- SMELL THEN DISSIPATED BUT RETURNED ON DESCENT FROM MID 20'S TO APPROX 17000. A/C FERRIED FROM EWR TO TYS. TYS MX REMOVED AND REPLACED THE NR 1 ENGINE ASSY AND OPS AND LEAK CHECKED GOOD.