As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PWM - FLT 4645 - A/C LEVEL AT 21K FT JUST ABOUT TO SET CRUISE MODE FELT YAW AND HEARD LOUD BANG NOISE. NR 1 ENGINE UNCOMMANDED SHUTDOWN. AIRCRAFT DECLARED EMERGENCY AND LANDED IN PWM. REPLACED NR 1 ENGINE ASSEMBLY. OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. (M)