# NHTSA Defect Petition DP78010
> **121 BRAKING SYSTEM, VARIOUS PROBLEMS** · Opened 1977-11-28 · Closed 1978-04-24
## Investigation
- **Action number:** DP78010
- **Type:** Defect Petition
- **Open date:** 1977-11-28
- **Close date:** 1978-04-24
- **Manufacturer:** FREIGHTLINER LLC
- **Affected makes:** FREIGHTLINER
- **Affected components:** SERVICE BRAKES, HYDRAULIC
- **Affected model years:** 1977
- **Affected (make, year) variants:** 1
## Summary

121 BRAKING SYSTEM, VARIOUS PROBLEMS

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=DP78010)
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