As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM - DURING ETOPS 2 CHECK - NOTICED LOUD AIR LEAK COMING FROM LT A/C PACK COMPARTMENT. FOUND LT HEAT EXCHANGER CRACKED AT WELD.//R/R LT PACK HEAT EXCHANGER (SECONDARY HALF) PER AMM 21-51-02 OPS AND LEAK CHECK OK. BITE CHECK LT PACK TEMP CONTROLLER. NO DEFECTS NOTED OK FOR SVC.