As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FLT 894 - APPROXIMATELY 40 MINUTES OUT OF PHL EN ROUTE TO FRA, CREW RECEIVED THE EICAS MESSAGE 'L ENG BLEED OFF' AND ASSOCIATED LIGHT. CREW ALSO RECEIVED THE EICAS MESSAGE 'L ENG OVHT' AND ASSOCIATED LIGHT. FLIGHT RETURNED TO PHL AND LANDED WITH NO FURTHER INCIDENT. MAINTENANCE REPLACED A BLOWN COUPLING ON THE TOP OF THE PRECOOLER VALVE. (X)