# Service bulletin SF633

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10200612
- Published by NHTSA: 2021\-08\-28
- Manufacturer's number: SF633
- Manufacturer's date: 2021\-08\-10
- NHTSA component: PARKING BRAKE

## NHTSA's summary

Field Service Campaign for FCCC School Bus Chassis Park Brake Alarm. On certain vehicles, the park brake alarm software parameter may be disabled. With a disabled park brake alarm, if the driver turns off the ignition without setting the park brake, the park brake alarm may fail to emit an audible sound.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10200612-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10200612-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes, Parking brake

## Vehicles listed

- 2021 to 2022 THOMAS BUILT BUSES SAF\-T\-LINER C2

JSON: [/v1/bulletins/10200612](/v1/bulletins/10200612)

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