# SLIP OR FALL OF PERSON
> MSHA accident `220021140016` · 04/06/2002 · Martin Marietta Aggregates
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY 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:** Machine maintenance
- **Injury source:** FLOOR,WALKING SURF-NOT UG
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** —
- **Mine experience:** 4 years
## Operator
- **Controller:** Martin Marietta Materials Inc
- **Operator:** Martin Marietta Aggregates
- **Mine:** [3300097](https://api.ai-analytics.org/mine/3300097)
## Narrative

AT 1030 A BEARING LOCKED UP ON USI SHUTTLE CONVEYOR. TO REMOVE BEARING NEEDED TO GET STONE OFF BELT, STARTED TO HOSE THE BELT HE WAS STANDING ON THE TAIL PULLEY GUARD. WHEN HE TURNED THE ON TH E HOSE IT KNOCKED HIM OFF BALANCE AND HE STEPPED OFF THE GUARD BACKWARDS AND TWISTED HIS LEFT KNEE.

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