As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT FA'S REPORTED AN ELECTRICAL ODOR IN THE CABIN AROUND ROW 3 AND 4. THERE WAS NO VISIBLE SIGN OF FIRE OR SMOKE. FA'S REPORTED ODOR GOT STRONGER IN TO DESCENT. THERE NEVER WAS ANY SMOKE AT ANY POINT. DIVERTED. LANDING UNEVENTFUL. FOUND THE NR 1 ENGINE OVER SERVICED. REMOVED 1 QUART OF OIL FROM ENGINE. GROUND RAN ENGINE, VERIFIED OIL LEVELS IN LIMITS. NO ODOR NOTED.