United States 92V078000
THOMAS BUILT BUSES, INC.
The problem
A BRAKE AIR LINE PLUMBING ERROR CAUSES THE SPRING BRAKES TO BE APPLIED WITHOUT BRAKE APPLICATION WHEN THE AIR PRESSURE IN THE PRIMARY TANK DROPS TO A LEVEL WHICH AUTOMATICALLY ACTIVATES THE SPRING BRAKE SYSTEM.
Risk
ACTIVATION OF THE SPRING BRAKE SYSTEM WITHOUT OPERATORBRAKE APPLICATION WILL CAUSE THE SPRING BRAKE TO BE APPLIED, LOCKING THE BRAKESWITHOUT ANY WARNING TO THE OPERATOR.
What owners should do
REPLACE AND REROUTE AIR BRAKE HOSE TO COMPLY WITH FMVSS 121.
Units 24