# MACHINERY
> **FATAL** · MSHA accident `220212070007` · 07/21/2021 · Thunder Basin Coal Company LLC
## Details
- **Degree of injury:** FATALITY
- **Classification:** MACHINERY
- **Accident type:** Struck by falling object
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Machine maintenance
- **Injury source:** CRANES,DERRICKS
- **Nature of injury:** CRUSHING
- **Body part:** MULTIPLE PARTS (MORE THAN ONE MAJOR)
- **Days lost:** —
- **Mine experience:** 13 years
## Operator
- **Controller:** Arch Resources Inc
- **Operator:** Thunder Basin Coal Company LLC
- **Mine:** [4800977](https://api.morvs.ai/mine/4800977)
## Narrative

A Millwright drove the pins out of a 200-ton crane boom to change out a section and the boom fell on employee.

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