As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT: 4073 CLE/LWB DURING TAKEOFF ROLL HEARD A LOUD BANG COMING FROM THE LEFT ENGINE A LOSS OF POWER AND A HUMMING NOISE AFTER ENGINE SHUTDOWN AND VISUAL INSPECTION SEVERAL BUMPS ARE FOUND ON THE LEFT ENGINE EXHAUST. REPLACED LEFT ENGINE ASSEMBLY.