# MACHINERY
> MSHA accident `220181130008` · 04/18/2018 · United States Steel Corp-Minnesota Ore Operations
## Details
- **Degree of injury:** DYS AWY FRM WRK & RESTRCTD ACT
- **Classification:** MACHINERY
- **Accident type:** Struck by flying object
- **Occupation:** Plumber, Pipefitter, Millwright
- **Activity:** Hand tools (powered)
- **Injury source:** METAL,NEC(PIPE,WIRE,NAIL)
- **Nature of injury:** FRACTURE,CHIP
- **Body part:** SKULL
- **Days lost:** 329
- **Mine experience:** 4 years
## Operator
- **Controller:** USX Corp (United States Steel Corp)
- **Operator:** United States Steel Corp-Minnesota Ore Operations
- **Mine:** [2103352](https://api.ai-analytics.org/mine/2103352)
## Narrative

Crew was using Catepiller Pin Pusher tool to install pin in pan feeder drive chain. Injured EE used a 10x1 inch bolt as a spacer to extend the length of the ram to finish driving the pin.  As pressure was applied the bolt slipped and ejected striking the EE in the hardhat and forehead resulting in a skull fracture.

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