As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. DURING FLIGHT BURNT SOCK SMELL REPORTED IN CABIN. SMELL DISSIPATED, THEN RETURNED WHEN RT PACK WAS TURNED OFF THE ON. FOUND SOURCE OF SMELL TO BE FROM NR 2 ENG DUE TO OIL WETTING BEHIND FAN BLADES. R & R NR 2 ENG IAW MCM CARD 71-94-01. LEAK & OPERATIONAL CHECK GOOD IAW MCM CARD 71-95-18.