The coating has also proven its ability to resist against a common phenomenon called leading edge curl (see photo below). Leading edge curl can introduce airfoil flutter which can lead to engine failures. On the T58 engine (H-46 helicopter) zero incidents occurred when operated with ER-7™ therefore the US Marine Corps have mandated the coating on their H-46 fleet. In recognition of MCT's support to improve aircraft safety, (PMA 226) officials presented MCT with a US Marine Corps Flag.