The Transportation Safety Board has made recommendations, has flagged this issue for many years. This is not new. DOT-111 punctures very easily because of its lack of thickness.
You have been talking to your American counterparts for many years. How much longer are you going to take to come to a decision so there might be a plan to phase this out? The last recommendations from the Transportation Safety Board are at least five or six years old. They have been flagging it.