Twin Commander Aircraft has developed a rudder-pedal seal kit that it says virtually eliminates pressurization leaks in a troublesome area. Leaks in the original boots that enclose the rudder-pedal horns can lead to a noticeable loss of pressure differential, resulting in 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 cockpit and cabin pressurization.