THOMAS SCHOOL BUS 1992: SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS
NHTSA Campaign ID Number: 92V078000
| Make | Model | Year |
|---|---|---|
| THOMAS | SCHOOL BUS | 1992 |
| Date Owners Notified | Date Received by ODI | Date Added to Database |
| 1992-05-15 | 1992-05-19 | 1992-05-29 |
Production Dates: 1992-01-01 - 1992-03-01
Manufacturers Involved: THOMAS BUILT BUSES, INC.
Component: SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS
Potential Number Of Units Affected: 24
Report Initiator: MFR MFR Report
Regulation Part Number: 571
Federal Motor Vehicle Safety Standard Number: 121
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.
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.
REPLACE AND REROUTE AIR BRAKE HOSE TO COMPLY WITH FMVSS 121.
SYSTEM: AIR BRAKES, FMVSS 121.VEHICLE DESCRIPTION:BUSES AND SCHOOL BUSES.
