In 2367, transporter chief Hedrick locked off access to the controls in transporter room 6 aboard the USS Enterprise-D. The security lockout was later broken by Geordi La Forge who was affected by the Tarchannen III species and beamed down to the planet. (TNG: "Identity Crisis" ) Later that year, Miles O'Brien locked off the instrument panel of the transporter to prevent Lwaxana Troi from beaming down to Kaelon II. (TNG: "Half a Life" )