# HANDTOOLS (NONPOWERED)
> MSHA accident `220090650019` · 03/03/2009 · Martin Marietta Northern California Aggregates,LLC
## Details
- **Degree of injury:** NO DYS AWY FRM WRK,NO RSTR ACT
- **Classification:** HANDTOOLS (NONPOWERED)
- **Accident type:** Struck by falling object
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Machine maintenance
- **Injury source:** METAL,NEC(PIPE,WIRE,NAIL)
- **Nature of injury:** FRACTURE,CHIP
- **Body part:** FINGER(S)/THUMB
- **Days lost:** 0
- **Mine experience:** 2 years
## Operator
- **Controller:** Heidelberg Materials AG
- **Operator:** Martin Marietta Northern California Aggregates,LLC
- **Mine:** [0400159](https://api.ai-analytics.org/mine/0400159)
## Narrative

Two employees were replacing a bearing on the ecentric shaft of the Noble feeder in #2 conveyor tunnel.  The shaft and bearings were supported by a chain and a chain hoist.  One of the chains slipped allowing the bearing to twist and drop two inches, hitting employees left thumb and breaking it.

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