# SLIP OR FALL OF PERSON
> MSHA accident `220083170066` · 10/23/2008 · Freeport-McMoRan Sierrita Ops.
## Details
- **Degree of injury:** DYS AWY FRM WRK & RESTRCTD ACT
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Over-exertion NEC
- **Occupation:** Outside foreman, Leadman
- **Activity:** Hand tools (not powered)
- **Injury source:** BROKEN ROCK,COAL,ORE,WSTE
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 10
- **Mine experience:** 0.62 years
## Operator
- **Controller:** Freeport-McMoRan Inc
- **Operator:** Freeport-McMoRan Sierrita Ops.
- **Mine:** [0200144](https://api.ai-analytics.org/mine/0200144)
## Narrative

Was changing a ripper tooth on D-10 dozer. As he was prying on pin, he lost his balance and stepped back onto a rock twisting his knee.

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