# MACHINERY
> MSHA accident `220172980008` · 10/17/2017 · N.A. Degerstrom
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **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:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 3 years
## Operator
- **Controller:** N A Degerstrom
- **Operator:** N.A. Degerstrom
- **Mine:** [1001702](https://api.ai-analytics.org/mine/1001702)
## Narrative

A tire technician was removing the inside dual lug nuts of a Komatsu 100 ton truck (T331). While positioning the 1' spline gun the technician twisted wrong causing employee to strain employee's back below the left shoulder blade.

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