As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BFM - FLT 9244 EN ROUTE BFM TO PHL. AFTER TAKEOFF, A STRONG ODOR ENTERED THE COCKPIT RESULTING IN THE BURNING SENSATION OF THE CREW'S EYES. THE CREW DONNED THEIR OXYGEN MASKS AND RETURNED TO FIELD BFM WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED A LEAKING NUMBER FOUR BRAKE ASSEMBLY, AND SERVICED A DEPLETED BLUE HYDRAULIC SYSTEM.