What was found
AS AIRCRAFT LEVELED OFF AT 35,000 FEET DURING POWER REDUCTION, THE LEFT ENGINE EXPERIENCED COMPRESSOR STALLS. CREW FURTHER REDUCED LEFT ENGINE POWER. STALLS CEASED AND AIRCRAFT RETURNED TO DTW. MAINTENANCE REPLACED THE LEFT ENGINE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AS AIRCRAFT LEVELED OFF AT 35,000 FEET DURING POWER REDUCTION, THE LEFT ENGINE EXPERIENCED COMPRESSOR STALLS. CREW FURTHER REDUCED LEFT ENGINE POWER. STALLS CEASED AND AIRCRAFT RETURNED TO DTW. MAINTENANCE REPLACED THE LEFT ENGINE.