As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 455 PHX-SLC - ATB - ON CLIMB-OUT AT ABOUT 7500 FT, CREW REPORTED TWO AUDIBLE LOUD BOOMS FROM THE NR 1 ENGINE. NO ECAM WARNINGS CAME UP. REDUCED POWER TO IDLE, ALL PARAMETERS REMAINED NORMAL INCLUDING OIL PRESSURE AND TEMPERATURE. AIRCRAFT RETURNED TO PHX. MAINTENANCE REMOVED AND REPLACED THE LOWER RIGHT 7TH STAGE (7B) BLEED VALVE, NR 1 ELECTRONIC ENGINE CONTROL (EEC), AND SWAPPED N1 PROBE LEADS FROM TERMINALS 1 AND 2 TO TERMINALS 3 AND 4. ENGINE RUN OPERATIONAL CHECK GOOD.