#ec2minatt i-555555 –disable-api-termination false –region us-east-1 -K /EC2_API_Certs/pk-4GGV.pem -C /EC2_API_Certs/cert-GV.pem

Make a note of the ebs-id attached

Terminate the Instance from the AWS Console and then Delete the EBS, same could be done through command line