As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DCA - FLT 1488 - CREW REPORTED A STRONG OIL TYPE ODOR IN CABIN AT FL280 WHEN USING THE RIGHT PACK. WHEN CREW TURNED OFF RIGHT PACK, ODOR DISSIPATED. FLIGHT CONTINUED WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE RIGHT AIR CYCLE MACHINE OVERSERVICED. DRAINED OIL AND SERVICED TO PROPER LEVEL. OPS CHECK GOOD. (M)