# NHTSA Engineering Analysis EA09009
> **AIR BRAKE SYSTEM CONTROL VALVES** · Opened 2009-06-18 · Closed 2010-08-13
## Investigation
- **Action number:** EA09009
- **Type:** Engineering Analysis
- **Open date:** 2009-06-18
- **Close date:** 2010-08-13
- **Manufacturer:** Mack Trucks, Inc.
- **Affected makes:** MACK
- **Affected components:** SERVICE BRAKES, AIR
- **Affected model years:** 2005, 2006, 2007, 2008
- **Affected (make, year) variants:** 11
## Summary

INVESTIGATION HAS NOT IDENTIFIED A DEFECT.COMPLAINTS HAVE ABATED.SEE CLOSING REPORT FOR FURTHER DETAILS.

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=EA09009)
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