As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL/LAX - FLT 33 - AIRCRAFT INDICATED NR 1 ENGINE OVERTEMP AND OVERSPEED WARNINGS ON CLIMB-OUT. SHUT DOWN NR 1 ENGINE, DECLARED EMERGENCY, AND THEN RETURNED TO FIELD. FLIGHT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE LEFT ENGINE ASSY. OPS CHECKED OK. (X)