Twin Commander Aircraft has developed a pressurization leak kit for rudder-pedal horns. Leaks in the boots that enclose the rudder-pedal horns can result in a noticeable loss of pressure differential, meaning a higher cabin altitude at cruise. Twin Commander’s new rudder-pedal seal kit includes a plug for the rudder-pedal horns/brake valve arms and improved boots that help preserve cabin pressurization. The new rudder-pedal seal kit is in stock at Twin Commander authorized service centers as CK-184 for Twin Commander models 680, 685, 690, and 690A/B/C; and CK-185 for the 690D and 695A.