As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED THAT AN ACID, BURNING RUBBER & MUSTY ODOR CAME ON VERY STRONG RESULTING IN A SLIGHT BURNING IN EYES. DIVERTED WITH NO EMERGENCY WAS DECLARED AND LANDED SAFELY WITH NO FURTHER INCIDENT. THE AIRCRAFT WAS GROUNDED. MAINTENANCE FOUND THE APU OIL SYSTEM OVERSERVICED AND SERVICED IT TO THE PROPER LEVEL.