'Don't fly planes with PW engines on long routes'

This restriction has been imposed for safety reason as there must be an airport within one hour of flying time during entire journey of A320 Neo with PW engines so that the plane can safely land at the nearest alternate on a single engine when one engine develops a snag. Twin engine planes can land on one engine at suitable nearest airport when an engine has a snag.

from Times of India http://bit.ly/2RwFeeZ