Industrial Disasters: The Decisive Role of Technical Expert Analysis

Industrial disasters, whether involving aviation, petrochemicals, nuclear energy, or construction, share one defining characteristic: their legal resolution depends on mastery of the technical file. Expert analysis is rarely neutral. It is the primary weapon of the trial.

TL;DR

• Court-appointed expert analysis is the central element of industrial litigation.
• It is governed by articles 156 and following of the Code de procédure pénale (French Code of Criminal Procedure) and articles 232 and following of the Code de procédure civile (French Code of Civil Procedure).
• The adversarial principle requires the parties to be present at all stages of the expert proceedings.
• Counter-assessments and privately commissioned expert reports are major defense tools.

The Weight of Technical Evidence in a Case

An industrial disaster rarely leaves an obvious culprit. It leaves a scene, debris, data, witnesses, and a tangle of possible causes. The role of the law is to transform this raw material into a coherent account that is legally binding on the parties.

This transformation is achieved through expert analysis. The judge does not have the technical competence to analyze a metallurgical defect, a gas leak, or an automated system malfunction. The judge relies on the expert. But the expert is not a judge. The expert provides elements. The attorney's work is to understand those elements, to contest them where necessary, and to translate them into legal arguments.

The Procedural Framework for Expert Analysis

In Criminal Matters

Expert analysis is governed by articles 156 to 169 of the Code de procédure pénale. It is ordered by the juge d'instruction (French examining magistrate), the trial judge, or the public prosecutor. The expert is appointed from the lists held by the court of appeal, or from outside those lists for highly specialized fields.

The adversarial principle is enshrined: the parties are notified of the proceedings, may attend them, may ask questions, and may request additional investigative measures.

In Civil Matters

Articles 232 to 248 of the Code de procédure civile govern expert analysis. It is ordered at the request of the parties or on the court's own motion. The report is filed with the court registry and submitted for the parties' observations.

Practical Stakes

"In an industrial case, the expert is not a witness. The expert is a protagonist. The appointment, the scope of the mission, the methods, the interlocutors: everything is the subject of procedural battle."

The Appointment of the Expert

The choice of expert often determines the trajectory of the case. The defense must examine:

• the specific competencies of the proposed expert;
• the expert's previous assignments and their conclusions;
• the expert's independence from the parties (in particular the industrial groups involved);
• the coherence of the expert's multidisciplinary team in complex cases.

Any objection to the appointment must be raised immediately, by way of a requête en récusation (application for recusal) if necessary.

The Scope of the Mission

The order defining the mission is crucial. A mission drafted too narrowly prevents the expert from addressing the essential questions. A mission drafted too broadly dilutes the analysis. The defense intervenes actively to:

1. Have specific questions added to the mission.
2. Have the scope of investigation extended to elements overlooked by the initial inquiry.
3. Have the expected methods of analysis specified.

Participation in the Proceedings

This is the longest and most strategic phase. It can last months or even years. Attendance at the proceedings makes it possible to:

• monitor the methods employed;
• flag deficiencies in real time through written observations (dires);
• produce contradictory technical elements;
• request additional investigative measures.

Absence from these proceedings is rarely recoverable.

Defense Tools

The Counter-Assessment

Article 167 of the Code de procédure pénale allows a party to request a supplementary expert analysis or a counter-assessment (contre-expertise). This is appropriate when the conclusions contain contradictions, gaps, or methodological errors.

The request must be technically justified. In practice, well-prepared counter-assessments result, in the majority of cases, in modification of the initial analysis.

The Private Expert Report

Distinct from the court-appointed expert assessment, a private expert report is commissioned by one party from an expert of that party's choosing. Its evidentiary value is limited, but it may be placed before the court. It is often the preliminary tool used to mount a challenge to the court-appointed expert's assessment.

In the cases I handle, commissioning a private expert report is almost standard practice to prepare written observations, anticipate the court-appointed expert's conclusions, and inform the defense strategy.

Examination at the Hearing

The expert report is submitted for examination at the hearing. The expert may be heard on the basis of article 168 of the Code de procédure pénale and article 245 of the Code de procédure civile. This is the moment when the technical command built throughout the proceedings is translated into oral argument.

Specific Pitfalls in Aviation and Heavy Industry

Litigation arising from collective accidents presents particular features that heighten the expert-related stakes:

1. Multiple investigating authorities. In aviation matters, the BEA (Bureau d'Enquêtes et d'Analyses pour la sécurité de l'aviation civile, the French Civil Aviation Safety Investigation Authority) conducts a technical investigation running parallel to the judicial investigation. Their purposes differ: the BEA seeks to prevent, the judge seeks to adjudicate. The coexistence is legally delicate.
2. Geographic remoteness of the file. Expert proceedings may take place at several sites, in France or abroad, making effective participation both costly and time-consuming.
3. The sensitivity of economic interests. The actors involved (manufacturers, operators, equipment suppliers) have significant interests that may influence conduct during the proceedings.
4. The length of the procedure. A complex expert assessment can span more than five years. Maintaining coherence and quality in the defense over that period is itself a challenge.

In Summary

Expert analysis is the primary weapon of industrial litigation. The defense of victims or of those under investigation is won or lost in the expert proceedings, long before the hearing. This requires sustained technical and procedural commitment, adequate human resources, and a clear strategy from the moment the expert is appointed.

The firm intervenes in close coordination with French and international private experts in litigation involving collective accidents, whether aviation, rail, or major industrial disasters.