# MACHINERY
> MSHA accident `220071920020` · 04/24/2007 · Montana Resources, LLC
## Details
- **Degree of injury:** DYS AWY FRM WRK & RESTRCTD ACT
- **Classification:** MACHINERY
- **Accident type:** Over-exertion NEC
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Hand tools (powered)
- **Injury source:** HAND TOOLS,POWERED,NEC
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 31
- **Mine experience:** 3.42 years
## Operator
- **Controller:** Montana Resources Inc
- **Operator:** Montana Resources, LLC
- **Mine:** [2400338](https://api.ai-analytics.org/mine/2400338)
## Narrative

Employee was using an impact wrench to remove nuts from the ball mill bolts.  He was bent over and when he reached to his left he felt his right knee pop.  Doctor felt it was just a strain on first visit.  It was later diagnosed as a torn meniscus.  Employee had his knee scoped on 7/9/07 for repair.  First shift missed was 7/9.

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