As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SOON AFTER TAKEOFF, THE CREW DETECTED A AN ELECTRICAL SMELL. AFTER ATTEMPTING AND FAILING TO ISOLATE SOURCES. THEY ELECTED TO RETURN TO DEPARTURE. AIRPORT, AND LANDED UNEVENTFULLY. THERE WAS NO EMERGENCY DECLARED. MAINTENANCE REPLACED EL RHEOSTAT IAW MM. (K)