As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1242 CLT-BOS, CREW DECLARED EMERGENCY AND AIR RETURN TO CLT DUE TO NR 2 ENGINE FAILED AT 16000FT. REIGNITED APPROX 20 SECONDS LATER WITH NO EICAS MESSAGES. THE NR 2 ENGINE FADEC WAS REMOVED AND REPLACED PER AMM 73-00-00-800-812. PERFORMED GROUND POWER ASSURANCE CHECK PER ENG MANUAL CF34-10E ESM 72-00-00 TESTING 03, NO FAULTS FOUND.