When it is needed
For disputes about defects, handover, repairs or causes of equipment faults.
What we examine
- Locomotives and wagons
- Assemblies and parts
- Defect assessment records
Materials to prepare
- Asset passports and identifiers
- Manuals and requirements
- Inspection and repair records
- Operating history
Sample questions
- Is the asset unambiguously identified?
- Which defects can be established?
- How do they relate to the documentation?
- Which technical explanations of the cause are supported?
- What data are insufficient for a definitive finding?
Build a set of questions →
How the work is carried out
- Clarifying the asset and questions
- Agreed inspection
- Analysis of defects and history
Result
A report describing the technical features identified and presenting reasoned findings on the task.
What affects the conclusions
Clearance of rolling stock for traffic and mandatory inspection procedures are outside the independent examination.
Frequently asked questions
Can an individual wheelset be examined?
Yes, where its identifiers, origin and preservation are supported.
Must operation be suspended?
The owner and responsible personnel determine access and safe inspection conditions.
Relating an assembly defect to its repair and operating history
For an individual part or assembly, its connection to the wagon, locomotive or other asset examined must be supported. Markings on the asset, passport details, removal and installation records, repair documents and photographs are compared. The distinction between a type designation and an individual number must remain clear throughout the examination.
The history can conveniently be organised by event: detection of a feature, inspection, removal, defect assessment, restoration or replacement, and subsequent operation. Each entry identifies its source and date. If the origin of a removed component is known only from the supplier's account, this is not equated with a continuous documented chain of custody.
- Rolling stock unit number and assembly designation.
- Installation position and information about earlier replacements.
- Original inspection, repair and defect assessment records.
- Available inspection results identifying the asset.
- Changes after the fault was discovered, including cleaning and surface treatment.
The observed defect, its presumed cause and its effect on operability are considered separately. The presence of damage, for example, does not automatically show whether it arose before the assembly was removed or during subsequent handling. The final answer must explain which features are directly established and what information is insufficient to assess a causal relationship.
This approach is useful in disputes about repair quality and equipment handover. It does not replace required operating inspections or clearance of rolling stock for traffic.
When a removed assembly is supplied for examination, its connection to the wagon or other rolling stock unit at the time of the event matters. The model and part type do not themselves establish that connection. Available numbers, removal records and photographs of its position are used. If markings are absent or records conflict, the assembly's origin is treated as a separate unresolved question rather than assumed from similarity.
