The defect
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.
The 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.
The remedy
REPLACE AND REROUTE AIR BRAKE HOSE TO COMPLY WITH FMVSS 121.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Thomas Bus | 1992 |
| Thomas School Bus | 1992 |
Components: SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Thomas Bus | 1992 | 0 | 5 |
| Thomas School Bus | 1992 | 0 | 10 |
Other service brakes, air recalls in 1992
7 of the 185 recall campaigns reported to NHTSA in 1992 concerned the service brakes, air; THOMAS BUILT BUSES, INC. filed 100 campaigns in all.
| 92V176000 2 Dec 1992 | NAVISTAR INTL CORP. |
| 92V122000 18 Aug 1992 | TRAILMOBILE INC. |
| 92V116000 3 Aug 1992 | LAG MOTORCOACH USA |
| 92V085000 17 Jun 1992 | BLUE BIRD BODY COMPANY |
| 92V069000 13 May 1992 | PACCAR, INCORPORATED |
| 92V038000 1 Apr 1992 | VOLVO GM HEAVY TRUCK CORP |
NHTSA recalls (public domain) · all recalls of 1992