As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 715 - DEPARTING PHL EXPERIENCED NAUSEATING FUMES IN COCKPIT. TURNED OFF BOTH PACKS, WENT ON TO OXYGEN. CREW PERFORMED AN AIR TURN BACK TO PHL AND LANDED SAFELY WITHOUT FURTHER INCIDENT. FOUND A-SYSTEM AND STANDBY HYDRAULIC RESERVOIRS OVERSERVICED. DRAINED EXCESS FLUID TO FULL MARK. SYSTEM OPERATES NORMAL. (M)