# SLIP OR FALL OF PERSON
> MSHA accident `220163510011` · 10/18/2016 · United States Gypsum Company
## Details
- **Degree of injury:** NO DYS AWY FRM WRK,NO RSTR ACT
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Fall to the walkway or working surface
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Hand tools (not powered)
- **Injury source:** FLOOR,WALKING SURF-NOT UG
- **Nature of injury:** JOINT,TENDON,MUSCL INFLAM
- **Body part:** ELBOW
- **Days lost:** 0
- **Mine experience:** 17.87 years
## Operator
- **Controller:** USG Corporation
- **Operator:** United States Gypsum Company
- **Mine:** [1300433](https://api.ai-analytics.org/mine/1300433)
## Narrative

Employee was torquing track roller bolts on a D8-R dozer when torque wrench internal gears stripped out of ratchet head of wrench. Employee was in squatting position when torque ratchet failed causing employee to lose balance and strike the floor hitting elbow.

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