As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. ON TAKEOFF TOWER AND ANOTHER AIRCRAFT REPORTED LEFT ENGINE LEAKING FUEL (NO LEAK INDICATED IN THE AIR). AN EMERGENCY WAS DECLARED AND RETURNED TO PHL WHERE THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. REPLACED THE HPTACC VALVE, WHICH WAS LEAKING FUEL AND ACCOMPLISHED A SATISFACTORY LEAK/OPERATIONAL CHECK, PER AMM 75-21-10.