# EXPLODING VESSELS UNDER PRESSURE
> MSHA accident `220260890027` · 03/23/2026 · Martin Marietta Materials Soutwest, LLC
## Details
- **Degree of injury:** PERM TOT OR PERM PRTL DISABLTY
- **Classification:** EXPLODING VESSELS UNDER PRESSURE
- **Accident type:** Struck by... NEC
- **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:** AMPUTATION OR ENUCLEATION
- **Body part:** FINGER(S)/THUMB
- **Days lost:** 4
- **Mine experience:** 4 years
## Operator
- **Controller:** Martin Marietta Materials Inc
- **Operator:** Martin Marietta Materials Soutwest, LLC
- **Mine:** [4103360](https://api.ai-analytics.org/mine/4103360)
## Narrative

An OTR technician at a quarry installed two spare tires and a new wheel on a Komatsu WA900 loader. While demounting the scrap tire/wheel in the storage yard, EE removed the O-ring with EE's left hand. Residual pressure caused the bead seat band to spring upward, striking EE's left thumb and index finger. This amputated the tip of EE's left index finger and crushed EE's left thumb.

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