The decision this case can inform
Use this record when commissioning heavy movable equipment that shows abnormal tracking, requires repeated realignment, or departs from its rail and support design.
Final MSHA fatal-accident investigation with detailed geometry and defect findings. The case supports a stop-and-correct principle, not a reusable trolley redesign.
What the public record actually establishes
- F1
The burner and trolley assembly weighed 16,636 pounds.
- F2
Rail geometry left only about 9/16 inch of wheel contact on one side against a specified minimum of 1 3/4 inches.
- F3
Drifting and tracking abnormalities were known during construction and testing, and a come-along had been used for realignment.
- F4
The assembly fell, killing one mechanic and seriously injuring two others.
Facts and reported results are kept separate from the lesson a plant may choose to test.
Operating context
A new kiln burner trolley had known tracking abnormalities during construction and testing.
Intervention or finding
MSHA found insufficient wheel-to-rail contact, deficient rail geometry, torsional deflection, and failure to correct the known defect.
Documented result
The 16,636-lb burner and trolley fell, killing one mechanic and seriously injuring two.
Plant interpretation
Treat abnormal commissioning behavior as a stop condition and close design and installation deviations before handover.
Transfer boundary
Geometry-specific case; redesign requires qualified engineering.
Questions to verify at your plant
These are decision checks, not operating instructions. Resolve them through local risk assessment, technical review, and authorization.
- 01
Which observed commissioning behaviors are defined as stop conditions rather than accepted as punch-list items?
- 02
Have installed geometry, deflection, wheel contact, loads, and tolerances been independently verified against design?
- 03
How are recurring realignment or binding events escalated into an engineering defect review?
- 04
Who formally accepts the corrected condition before handover and occupied operation?