# NHTSA Preliminary Evaluation PE89121
> **TRAILER SEPARATION** · Opened 1989-05-10 · Closed 1989-09-05
## Investigation
- **Action number:** PE89121
- **Type:** Preliminary Evaluation
- **Open date:** 1989-05-10
- **Close date:** 1989-09-05
- **Manufacturer:** I.R. WITZER CO., INC.
- **Affected makes:** WITZER
- **Affected components:** STRUCTURE
- **Affected model years:** 1985, 1986, 1987, 1988, 1989, 1990
- **Affected (make, year) variants:** 6
## Summary

SUMMARY:A CONSTRUCTION COMPANY ALLEGES CATASTROPHIC FAILURE OF THE JHOOKS ON THEIR 1987 WITZER TRAILER RESULTED IN A SERIOUS ACCIDENT.===

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=PE89121)
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