# SLIP OR FALL OF PERSON
> MSHA accident `220081340040` · 04/22/2008 · Thunder Basin Coal Company LLC
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Over-exertion NEC
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Getting on or off equipment
- **Injury source:** LOOSE DIRT AND MUD
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 19
- **Mine experience:** 2.6 years
## Operator
- **Controller:** Arch Resources Inc
- **Operator:** Thunder Basin Coal Company LLC
- **Mine:** [4800977](https://api.ai-analytics.org/mine/4800977)
## Narrative

At the time of the incident the technicial was trouble-shooting a power problem with the rear engine of a scraper. After replacing the air filter and fuel filter the tech started to step from the left rear fender to the rear push block. As he was making the step, leading with his left foot, his right foot caught on some dried mud causing his knee to twist.

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