As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FLT 98 - AIRCRAFT DEPARTED WITH THE RIGHT HIGH STAGE BLEED VALVE ON MEL. AFTER TAKEOFF, THE RIGHT PACK ISOLATION VALVE FAILED, DISABLING THE RIGHT AIR CONDITIONING PACK. THE FLIGHT RETURNED TO PHL AND LANDED WITH NO FURTHER INCIDENT. MAINTENANCE REPLACED A FAULTY TERMINAL EYELET AT POST 2 ON THE STUD PLATE ON THE HPSOV. (M)