Vehicle recall 92V078000 · May 19, 1992
Thomas Bus and School Bus
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…
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- 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.
- Consequence
- 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.
- Remedy
- Replace and reroute air brake hose to comply with FMVSS 121.
- Notes
- System: air brakes, FMVSS 121.VEHICLE description:buses and school buses.
Recall details
- NHTSA campaign
- 92V078000
- Reported to NHTSA
- May 19, 1992
- Filed by
- THOMAS BUILT BUSES, INC.
- Owner notification
- May 15, 1992
- Vehicles potentially affected
- 24
- Initiated by
- the manufacturer
- Components
- Service brakes, air › Supply › Hoses, lines/piping, and fittings
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Thomas Bus (1992): 1992
- Thomas School Bus (1992): 1992
Has your Thomas been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Thomas dealer can also check your VIN. Recall repairs are free.