# NHTSA Preliminary Evaluation PE88061
> **SEAT TETHER FAILURE** · Opened 1988-06-21 · Closed 1988-09-12
## Investigation
- **Action number:** PE88061
- **Type:** Preliminary Evaluation
- **Open date:** 1988-06-21
- **Close date:** 1988-09-12
- **Manufacturer:** Mack Trucks, Inc.
- **Affected makes:** MACK
- **Affected components:** SEATS
- **Affected model years:** 1985, 1986
- **Affected (make, year) variants:** 2
## Summary

SUMMARY: TRUCK DRIVER REPORTS SEAT TEATHERS ARE NOT PROPERLY ADJUSTED AT FACTORY, ALLOWING SEAT TO HINGE FORWARD IN A COLLISION. TEATHERS ACT AS RESTRAINERS, AND IF IMPROPERLY ADJUSTED SEAT BELT IS USELESS AS IT IS ATTACHED TO THE SEAT. DURING SUDDEN DECELERATION OR COLLISION THE WHOLE ASSEMBLY HINGES FORWARD ALLOWING POSSIBLE FACIAL CONTACT WITH THE WINDSHIELD.===

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=PE88061)
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