As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FLT 894 - FLIGHT RETURNED TO FIELD TO PHL DUE TO THE EICAS MESSAGE 'R ENG PRV', THE RIGHT ENGINE 'BLEED' LIGHT ILLUMINATING, AND THE RIGHT DUCT PRESSURE INDICATING ZERO. FLIGHT LANDING WITH NO FURTHER INCIDENT. MAINTENANCE REPLACED THE PRV, PRV CONTROLLER, A BLEED CARD AND THE OVERPRESSURE SWITCH (S735). THE SWITCH FIXED THE PROBLEM. (M)