As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 879 - EN ROUTE ORD-RST, SHORTLY AFTER TAKEOFF DETECTED ELECTRICAL SMELL. AFTER FIVE MINUTES SMELL DISSIPATED. SHORTLY BEFORE LANDING RST ELECTRICAL SMELL RETURNED. LANDED RST WITHOUT FURTHER INCIDENT. REPLACED NR 1 SIDE RECIRCULATION FAN. ACCOMPLISHED PACK BURNOUT PER THE MM. NO SMELL OR ODOR NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)