As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. AT CRUISE, FL 280, WITH REDUCTION OF POWER, RECEIVED MULTIPLE (2) COMPRESSOR/ENGINE STALLS WITH SELF RECOVERY. MOMENTARY ECAM (LEFT ENGINE) THAT SELF CLEARED. ACCOMPLISHED BORESCOPE ON NR 1 ENGINE WITH NO DEFECTS NOTED. MAINTENANCE FOUND THE IP CHECK VALVE ON NR 1 ENGINE BUSHING OUT OF TOLERANCE AND REPLACED THE IP CHECK VALVE. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED, PER AMM 36-11-41. SUPPLEMENTAL REPORT: ADDED TIMES AND CYCLES FOR AIRCRAFT TO SECTION 3.