As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#2220, LHR-JFK. (ETOPS) (AIRCRAFT DIVERTED TO SNN) 'DUE TO COMPRESSOR STALL AND DAMAGE TO ENG #2, OVER PSI VALVE REQUIRES REPLACEMENT AS PRECAUTIONARY; REMOVED AND REPLACED ENG #2 OVERPRESSURE VALVE IAW AMM 36-11-49. LEAK CHECK OK. OPS CHECK OK.'