United States 96V053000
WESTERN STAR TRUCKS, INC.
The problem
THESE TRUCKS WERE NOT BUILT WITH INVERSION VALVES DUE TO A PROGRAMMING ERROR. THE INVERSION VALVE PROVIDES MODULATED SPRING BRAKE APPLICATION DURING EMERGENCY BRAKING WHEN THE "A" PORTION OF THE AIR BRAKE SYSTEM HAS FAILED.
Risk
IN AN EMERGENCY SITUATION, THE BRAKE SYSTEM WOULD NOT WORK PROPERLY INCREASING THE POTENTIAL FOR A VEHICLE ACCIDENT.
What owners should do
DEALERS WILL INSTALL AN INVERSION VALVE IN THESE VEHICLES.
Units 12