As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1419 PHL-LAX - EMERGENCY LANDING - CREW REPORTED A COMPRESSOR STALL AT FL310 ON THE NR 2 ENGINE. AIRCRAFT DESCENDED TO 280 AND VIBRATIONS CONTINUED. ENGINE WAS SHUT DOWN DUE TO BLUE ELECTRICAL SYSTEM FAILURE. CREW DECLARED AN EMERGENCY AND DIVERTED TO COS. MX R&R THE NR 2 ENGINE DUE TO FAILED BOROSCOPE. ALSO REPLACED BLUE SYSTEM HYDRAULIC RESERVOIR PRESSURIZATION LINE AND HYDRAULIC LINE FROM PUMP TO ACOUSTIC FILTER DUE TO CHAFING.