We wanted to provide some more information for the event affecting some instances in a single Availability Zone (euw2-az2) in the EU-WEST-2 Region. Starting at 2:05 AM PDT we experienced power and network connectivity issues for some instances, and degraded performance for some EBS volumes in the affected Availability Zone. As a result of this we also experienced elevated API latencies for some of our APIs, elevated API failure rates on the CreateSnapshot API, and elevated instance launch failure rates in the affected Availability Zone. By 4:50 AM PDT, power and networking connectivity had been restored to the majority of affected instances, and degraded performance for the majority of affected EBS volumes had been resolved. While we will continue to work to recover the remaining instances and volumes, for immediate recovery, we recommend replacing any remaining affected instances or volumes if possible.