# MACHINERY
> MSHA accident `220122540029` · 09/01/2012 · Antelope Coal LLC
## Details
- **Degree of injury:** NO DYS AWY FRM WRK,NO RSTR ACT
- **Classification:** MACHINERY
- **Accident type:** Struck by... NEC
- **Occupation:** Bulldozer operator, Universal operator, Heavy equipment operator, Operating engineer
- **Activity:** Bulldozer
- **Injury source:** METAL COVERS & GUARDS
- **Nature of injury:** FRACTURE,CHIP
- **Body part:** MOUTH/LIP/TEETH/TONGUE/THROAT/TASTE
- **Days lost:** 0
- **Mine experience:** 6.44 years
## Operator
- **Controller:** Cloud Peak Energy Resources LLC
- **Operator:** Antelope Coal LLC
- **Mine:** [4801337](https://api.ai-analytics.org/mine/4801337)
## Narrative

The dozer seat back fell off mounting bracket and was lodged down towards floor of operator cab. Operator tried to move it out of his way and return up to dragline pad. Operator had to use force to dislodge seat back to get it out of way, the seat came loose striking operator on upper lip with the mounting bracket.

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*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*