http://www.faa.gov/other_visit/aviation_industry/airline_ope...
i.e. A pilot that is not Pilot in Command in sterile cockpit cannot violate the sterility just because he doesn't have his hands on the controls.
Edit: using an approved device in an unforseen way != using an unapproved device.
Edit 2: This was reposted / moved to a proper reply.
http://www.faa.gov/other_visit/aviation_industry/airline_ope...