I believe it was Mechta who suggested the use of a confidential reporting system for raising concerns. Of course, air- and ground crew as well as maintainers can do-so using CHIRP. The oil industry have been offered a similar confidential occurrence reporting system but this offer has been rebuffed. It seems that while OGUK/Step Change In Safety would like greater workforce engagement, there are limits as to how much engagement is warranted, it appears.