Civil Law and Airport Security Screening Technology Malfunction Claims in Europe

1. Introduction

Airport security screening technology malfunction claims arise when equipment or software used for passenger, cabin-baggage or hold-baggage screening fails, produces a false result, creates excessive delay, or is unavailable.

Examples include:

X-ray or CT baggage scanner failure;

explosive-detection-system malfunction;

walk-through metal detector failure;

security-scanner false negatives or false positives;

explosive-trace-detection equipment failure;

automated threat-detection software error;

biometric/security-gate malfunction;

cybersecurity failure affecting screening systems;

screening-system outage causing missed flights;

defective maintenance or calibration;

failure to rescreen after equipment failure.

The important point is that European law does not have one single civil-liability regime for these claims. The claim may involve EU aviation-security law, passenger-rights law, national contract/tort law, public-authority liability, product liability, data-protection law and, increasingly, AI/cybersecurity rules.

There is also an important case-law limitation: European reported case law directly deciding damages for a defective airport security scanner is relatively sparse. The strongest authorities therefore include the 2025 Liège Airport Security judgment and the 2026 European Air Charter judgment, supplemented by cases dealing with airport security, automated/technical failures, causation and passenger rights.

2. EU Legal Framework

A. Regulation 300/2008 — Civil Aviation Security

Regulation (EC) No. 300/2008 establishes common EU rules for protecting civil aviation against unlawful interference.

It applies to EU civil airports, airport operators, air carriers and entities providing services at or through those airports. (EUR-Lex)

Most importantly for malfunction claims:

Screening obligation

EU rules require originating, transfer and transit passengers and cabin baggage to be screened, subject to specified exceptions.

Hold baggage must also be screened before loading. (EUR-Lex)

Security equipment

Article 12 requires equipment used for screening, access control and other security controls to comply with prescribed specifications and to be capable of performing the relevant security controls. (EUR-Lex)

This is highly relevant to a malfunction claim.

If a scanner is technically incapable of detecting prohibited articles, the claimant may argue:

equipment failure → breach of security obligation → inadequate screening → causation → damage.

3. Detailed Screening-Technology Requirements

Commission Implementing Regulation (EU) 2015/1998 provides detailed technical and procedural requirements.

Passenger screening may involve:

hand searches;

walk-through metal detectors;

explosive-detection dogs;

explosive-trace detection;

security scanners;

shoe-metal detection;

shoe-explosive detection.

Where the screener cannot determine whether a passenger carries a prohibited article, access must be denied or the passenger must be rescreened. (EUR-Lex)

For cabin baggage, permitted methods include:

hand search;

X-ray;

explosive-detection systems;

explosive-trace detection;

combinations of approved technologies.

Where the screening equipment or screener cannot determine whether prohibited articles are present, the baggage must be rejected or rescreened. (EUR-Lex)

Therefore, a technology malfunction does not necessarily justify simply allowing the passenger or baggage through.

4. Who Can Be Liable?

A malfunction claim may potentially involve several defendants.

The exact defendant depends heavily upon who controlled the equipment and who owed the relevant legal duty.

5. Civil Liability Structure

A typical civil claim can be analysed through seven questions:

1. Duty

Was there a contractual, statutory, regulatory or tort/delict duty?

2. Equipment malfunction

Did the scanner or software actually malfunction?

3. Breach

Was the equipment operated, maintained or monitored below the required standard?

4. Causation

Did the malfunction cause the claimant's particular loss?

5. Damage

Examples:

missed flight;

additional accommodation;

additional transport;

baggage loss;

physical injury;

psychological injury where legally recognised;

property damage;

economic loss.

6. Attribution

Was the relevant conduct attributable to:

airport;

contractor;

airline;

manufacturer;

public authority?

7. Defences

Possible arguments include:

extraordinary circumstances;

passenger fault;

absence of causation;

third-party interference;

unforeseeable cyberattack;

compliance with mandatory procedures;

limitation of liability.

6. Important Case Laws

Case 1 — Liège Airport Security SA v État belge, C-783/23 (2025)

This is one of the most important recent European cases for airport-security liability analysis.

Facts

Liège Airport Security carried out security tasks at Liège-Bierset Airport, including access-control and inspection functions.

A dispute arose over supervision and enforcement of national private-security requirements and the relationship between those requirements and the EU aviation-security system under Regulation 300/2008.

Decision

The CJEU held that Regulation 300/2008 permits several national bodies to have responsibilities concerning civil aviation security.

The EU requirement that a Member State designate an “appropriate authority” concerns coordination and monitoring of implementation of the common EU aviation-security standards.

It does not prevent another national authority from supervising private security undertakings under national legislation. (EUR-Lex)

Importance for malfunction claims

The case is important because it establishes that airport security can involve multiple layers of responsibility.

Thus, a malfunction claim should not automatically assume:

“EU aviation-security authority = only possible defendant.”

Instead, responsibility may be distributed among:

EU standards → national aviation authority → airport → security contractor → equipment provider.

Principle

Multiple security authorities can coexist; allocation of operational responsibility remains important.

7. Case 2 — NI and HZ v European Air Charter AG, T-656/24 (European Air Charter), 4 March 2026

This is the most directly relevant recent European authority involving airport security-check failure and passenger compensation.

Facts

Passengers were affected by delays associated with shortcomings in airport security checks.

The operating airline decided to wait for passengers who had not yet cleared security.

That decision affected the aircraft's subsequent rotation and caused a later flight to arrive more than three hours late.

Legal issue

Could the shortcomings in airport security constitute an extraordinary circumstance under Article 5(3) of Regulation 261/2004?

And what happens when the airline itself makes a decision that contributes to the later delay?

Judgment

The General Court held that the airline's autonomous decision to wait for passengers who had not cleared security could break the direct causal connection between the security-check problem and the later delay if that decision was the determining cause of the later delay. (EUR-Lex)

The Court emphasised the importance of causation.

Importance

This case demonstrates that:

security malfunction ≠ automatic airline exemption.

The analysis must determine:

What actually caused the passenger's loss?

For example:

security-system failure → passenger screening delay → airline waits → aircraft rotation delay

The final link may be legally attributable to the airline's own decision rather than entirely to the airport-security problem.

Principle

A security-system problem and an airline's subsequent operational decision must be separately analysed for causation.

8. Case 3 — Wallentin-Hermann v Alitalia, C-549/07 (2008)

Although this case concerned an aircraft technical problem rather than screening equipment, it provides an important principle for technical-malfunction claims.

The CJEU held that a technical problem is not automatically an extraordinary circumstance. The relevant event must be outside the normal exercise of the carrier's activity and beyond its actual control. (Infocuria)

Application to screening technology

By analogy, an airport or security contractor should not necessarily escape responsibility merely by saying:

“The machine unexpectedly failed.”

A court may examine:

maintenance;

calibration;

inspection;

software updates;

replacement arrangements;

redundancy;

technical monitoring;

training;

foreseeable equipment failure.

Principle

Unexpected technical failure does not automatically eliminate responsibility.

9. Case 4 — van der Lans v KLM, C-257/14 (2015)

The CJEU considered an unexpected technical aircraft malfunction.

The Court concluded that an unexpected technical problem that was not attributable to poor maintenance and was not detected during routine checks could still fall outside the concept of an extraordinary circumstance under Regulation 261/2004. (Infocuria)

Relevance

This provides a useful analogy for screening equipment.

Suppose:

CT scanner unexpectedly stops working.

The fact that the failure was unexpected does not by itself answer the legal question.

The court should examine:

whether the system was within the operator's normal operational sphere;

whether reasonable maintenance was performed;

whether alternative screening was available;

whether the failure could have been managed;

whether the failure actually caused the claimed damage.

Principle

Technical unpredictability and legal exoneration are different questions.

10. Case 5 — Pešková and Peška v Travel Service, C-315/15 (2017)

This case concerned an aircraft-bird collision and subsequent safety inspections.

After the bird strike, an authorised company performed a safety inspection. The carrier nevertheless arranged a second inspection, which contributed to the delay.

The CJEU held that carriers confronted with extraordinary circumstances must take measures appropriate to the situation and deploy available resources to minimise the resulting delay.

Relevance to screening technology

The analogy is particularly useful where:

security scanner fails → backup screening becomes available → airport/carrier chooses a particular response.

The legal question becomes not merely:

“Did the machine fail?”

but also:

“What did the responsible operator do after discovering the failure?”

For example:

Was a backup scanner available?

Could manual screening be used?

Was another security lane available?

Was baggage rescreened?

Was the passenger wrongly permitted through?

Was the malfunction reported?

Principle

Post-malfunction response can be as legally important as the initial technical failure.

11. Case 6 — Gahramanov v Azerbaijan, no. 26291/06 (2013)

This ECtHR case involved an airport passenger stopped by border officials after passport control because his name appeared in a database requiring further checking.

The Court recognised that air travellers may ordinarily be subjected to security checks, including identity checks and baggage searches, and that some restrictions associated with airport travel do not necessarily amount to a deprivation of liberty. (HUDOC)

Relevance

The case is useful where a technology malfunction causes:

prolonged identity verification;

repeated security screening;

database mismatch;

automated false alert;

inability to clear security.

The critical distinction is between:

ordinary security processing

and

excessive or legally unjustified restriction of liberty.

Principle

Airport security necessarily permits certain restrictions, but the intensity and duration of the restriction remain legally relevant.

12. Case 7 — Kasparov v Russia, no. 53659/07 (2016)

This is another significant airport-security authority.

The applicant was stopped at Sheremetyevo Airport during security and police checks. He was taken to a separate room, his ticket and passport were seized, and he was questioned and searched for several hours.

The ECtHR treated the circumstances as going beyond ordinary airport formalities and found an Article 5 deprivation of liberty. The airport-security circumstances therefore had to be distinguished from routine passenger screening. (HUDOC)

Relevance to technology malfunction

Suppose an automated security system:

falsely identifies a passenger;

repeatedly triggers an alert;

locks the passenger into a secondary screening process;

prevents departure for several hours.

A claim could potentially move beyond simple delay compensation into fundamental-rights and national civil/public-law liability.

Principle

A security process can become legally significant when its operation substantially exceeds ordinary airport formalities.

13. Case 8 — Gillan and Quinton v United Kingdom, no. 4158/05 (2010)

This ECtHR case concerned stop-and-search powers rather than airport screening.

The Court examined whether broad search powers complied with Article 8 and stressed the need for adequate legal safeguards against arbitrary exercise of power. (HUDOC)

Relevance

It is an analogical authority, not an airport-equipment case.

It becomes relevant where malfunctioning or automated screening technology results in:

arbitrary secondary screening;

repeated searches;

intrusive searches;

inadequate safeguards;

discriminatory or unexplained security alerts.

Principle

Security objectives do not remove the requirement for legal safeguards against arbitrary interference.

14. Case 9 — Beghal v United Kingdom (2019)

The ECtHR examined extensive examination powers at ports and airports under UK counter-terrorism legislation.

The Court considered, among other issues, the breadth of official discretion in examination and the availability of safeguards. (HUDOC)

Relevance

For automated screening, the case helps frame a broader question:

How much discretion can be delegated to a security system without adequate safeguards?

This is particularly relevant to:

AI risk scoring;

automated passenger selection;

biometric matching;

automated secondary screening;

unexplained security alerts.

Again, this is analogical rather than a malfunction-damages case.

15. Case 10 — European Air Charter + Regulation 300/2008 Combined Analysis

The most useful modern combination is:

European Air Charter

concerns causation following security-check shortcomings. (EUR-Lex)

Regulation 300/2008

requires security equipment to satisfy defined specifications and be capable of performing the relevant security controls. (EUR-Lex)

Together, they create an important litigation structure:

TECHNOLOGY FAILURE → SECURITY-CHECK SHORTCOMING → OPERATIONAL RESPONSE → CAUSATION → PASSENGER LOSS.

16. Is a Security Scanner a “Defective Product”?

Potentially, yes.

If an X-ray machine, CT scanner, explosive-detection system or other technological product is defective, the claim may potentially engage national implementation of the EU Product Liability Directive.

The analysis may involve:

Was the equipment defective?

Was the claimant injured or suffered legally recognised damage?

Was the defect present when the product was supplied?

Was the defect caused by software?

Was there inadequate maintenance?

Was there a cybersecurity vulnerability?

Was there an unsafe update?

Can causation be established?

For AI-enabled equipment, the distinction between:

hardware defect

and

software/algorithmic defect

becomes increasingly important.

17. AI-Based Security Screening

Modern airport screening increasingly involves automated systems.

Potential systems include:

automated X-ray interpretation;

CT baggage analysis;

facial recognition;

biometric identity verification;

automated threat detection;

anomaly detection;

machine-learning classification.

The legal problem becomes more complicated when the machine gives the wrong result.

Example

An AI baggage system classifies:

prohibited object = “no threat”

and the baggage passes through.

Potential issues include:

defective algorithm;

inadequate training data;

insufficient validation;

inadequate human oversight;

poor calibration;

software update failure;

cybersecurity compromise;

failure to escalate uncertain results.

18. Human Oversight

EU security rules already require trained and competent personnel involved in screening and security controls. (EUR-Lex)

Therefore, an operator cannot necessarily argue:

“The computer made the decision, therefore nobody is responsible.”

The legal question becomes:

Was the system properly designed to support human screening?

For example:

AI produces uncertain result → human review required → human ignores warning → prohibited item passes.

Liability could differ substantially from:

AI produces false negative → system design prevented meaningful human review.

19. Cybersecurity Malfunction

A screening system may also fail because of a cyberattack.

EU aviation-security rules specifically address protection of critical ICT systems and data from cyberattacks that could affect civil-aviation security. Airport operators and relevant entities must identify critical systems and implement measures for protection, detection, response and recovery. (EUR-Lex)

Therefore, a cyber incident can create two different questions:

External attack

Was the attack genuinely outside the operator's reasonable control?

Cybersecurity negligence

Did the operator fail to maintain appropriate security?

The second situation can potentially create civil liability even where the immediate technical malfunction was caused by a hacker.

20. False Negative vs False Positive

This distinction is extremely important.

A. False negative

The system says:

“No prohibited article.”

but a prohibited article exists.

This can produce:

security breach;

physical injury;

property damage;

aviation accident;

state/public-law consequences;

civil damages.

B. False positive

The system says:

“Threat detected.”

when there is no threat.

This may produce:

secondary search;

missed flight;

detention;

humiliation;

additional expenses;

privacy claims;

discrimination claims.

The legal issues are therefore different.

21. Causation Is Usually the Central Issue

Consider:

Scanner malfunction → passenger delayed 2 hours → passenger misses flight → later business meeting missed → €10,000 claimed.

The claimant must establish the causal chain.

A court may ask:

Did the scanner actually malfunction?

Was the malfunction the cause of the security delay?

Could the passenger have cleared security through another lane?

Did the passenger arrive sufficiently early?

Did the airline have another available flight?

Was the business loss foreseeable?

Is the claimed economic loss legally recoverable?

This is why European Air Charter is particularly useful: it demonstrates that the court must identify the determining cause rather than simply identify the first unusual event. (curia)

22. Security Malfunction and Flight-Delay Compensation

Regulation 261/2004 may become relevant when the malfunction causes:

missed departure;

cancellation;

arrival delay;

aircraft rotation disruption.

But the result is not automatic.

Under Article 5(3), extraordinary circumstances can exempt an airline from standard compensation where the circumstances could not have been avoided even if reasonable measures had been taken.

The CJEU has repeatedly required strict interpretation of this exception.

European Air Charter adds an important 2026 qualification: an airline's own independent operational decision can become the determining cause of a subsequent delay and break the direct causal chain. (EUR-Lex)

23. Airport Operator Liability

An airport operator may face a national civil-law claim where it:

fails to maintain equipment;

knowingly operates defective equipment;

fails to provide alternative screening;

fails to respond to alarms;

fails to train personnel;

fails to report a serious malfunction;

fails to maintain appropriate redundancy.

However, Regulation 300/2008 does not automatically create a private damages action for every breach.

The claimant normally has to identify the applicable national cause of action.

24. Security Contractor Liability

Where screening is outsourced, the contractor may be responsible for:

employee negligence;

inadequate supervision;

failure to operate equipment correctly;

failure to rescreen;

ignoring equipment alarms;

defective maintenance;

breach of its contractual obligations.

Liège Airport Security is particularly useful because it confirms that private security undertakings operating at airports remain subject to relevant national regulatory supervision even though EU aviation-security law requires an appropriate authority for coordination of common EU standards. (EUR-Lex)

25. Manufacturer Liability

A manufacturer may potentially face liability where the malfunction results from:

defective hardware;

defective software;

inadequate instructions;

unsafe design;

inadequate cybersecurity;

defective updates;

foreseeable misuse.

The claimant must nevertheless establish the elements required by the applicable product-liability regime.

A malfunction alone does not automatically prove that the manufacturer is legally responsible.

26. Public Authority Liability

A claim against a State or public authority may involve:

failure to supervise;

failure to enforce security requirements;

improper certification;

failure to react to known equipment defects;

inadequate security standards;

unlawful interference with passenger rights.

The legal route differs according to the country.

European law may provide the framework, while national public-authority liability law normally determines the actual damages claim.

27. Privacy and Data Protection

Security-screening technology can process personal data.

Examples:

passport data;

facial images;

biometric identifiers;

security alerts;

passenger identity information;

automated risk assessments.

A malfunction can therefore have both:

physical-security consequences

and

data-protection consequences.

For example:

facial-recognition error → passenger falsely flagged → prolonged secondary screening.

Possible issues include:

lawfulness of processing;

accuracy;

data minimisation;

retention;

automated decision-making;

access and correction rights;

discrimination.

28. Property Damage Claims

Suppose defective baggage-screening equipment damages a passenger's laptop or luggage.

The legal analysis could involve:

airport service contract + national tort/delict law + consumer law + carrier obligations.

The claimant would normally need evidence of:

ownership;

condition before screening;

damage;

causation;

value.

29. Personal Injury Claims

A more serious case might involve:

defective security gate → passenger trapped or struck → physical injury.

Potential causes of action may include:

negligence;

premises liability;

defective product;

contractual liability;

employer liability;

public-authority liability.

The exact cause of action depends upon the national law.

30. Economic-Loss Claims

Economic loss is more difficult.

Example:

scanner outage → missed flight → missed business meeting → lost contract.

The claimant must distinguish:

Direct loss

Additional ticket, hotel or transport expenses.

Consequential loss

Business opportunity allegedly lost because of the delay.

National civil law may impose stricter limits on purely economic or remote losses.

31. Main Defences

Defence 1 — No malfunction

The defendant argues that the system worked according to specification.

Defence 2 — No breach

The defendant argues that all mandatory procedures were followed.

Defence 3 — Alternative cause

The delay was caused by:

passenger lateness;

airline decision;

weather;

air-traffic restrictions;

another security incident.

Defence 4 — Extraordinary circumstance

The airline may invoke Article 5(3) Regulation 261/2004 where applicable.

Defence 5 — Third-party interference

For example:

cyberattack;

sabotage;

malicious interference.

Defence 6 — Lack of causation

The claimant cannot establish that the malfunction caused the actual loss.

Defence 7 — Excessive damages

The claimed loss may be too remote or insufficiently proven.

32. Evidence in a Security-Technology Case

A claimant should ideally obtain:

Technical evidence

equipment logs;

error codes;

maintenance records;

calibration records;

software version;

system alerts;

downtime records.

Operational evidence

CCTV;

security-lane records;

passenger-processing timestamps;

staff reports;

incident reports;

rescreening records.

Causation evidence

boarding pass;

scheduled departure;

actual departure;

security clearance time;

alternative flights;

hotel invoices;

transport invoices.

AI evidence

For automated systems:

model version;

training/validation documentation;

confidence scores;

audit logs;

human-review records;

override records;

update history.

33. Six Core Cases — Revision Table

The first two are the most directly relevant modern European authorities; the remaining cases should be described as supporting or analogical authorities rather than as cases that themselves decided defective-scanner damages. (EUR-Lex)

34. Hypothetical Example

Suppose an airport's CT baggage scanner develops a software defect.

The system incorrectly classifies a prohibited object as harmless.

The baggage passes through security.

The object subsequently causes an incident that injures another passenger.

The legal chain becomes:

Software defect
↓
Screening technology malfunction
↓
Failure to identify prohibited article
↓
Failure of required security control
↓
Object enters security-restricted environment
↓
Incident
↓
Physical injury
↓
Civil damages claim

The claimant would need to establish:

DEFECT + DUTY + BREACH + CAUSATION + DAMAGE + RESPONSIBLE PARTY.

35. Airport Security Technology Malfunction — Special AI Formula

For AI-enabled screening systems, the analysis can be reduced to:

AI SCREENING LIABILITY = DESIGN → DATA → VALIDATION → EQUIPMENT → SOFTWARE → HUMAN OVERSIGHT → MAINTENANCE → CYBERSECURITY → MALFUNCTION → CAUSATION → DAMAGE

This is particularly useful for:

AI X-ray interpretation;

CT baggage screening;

facial recognition;

biometric gates;

automated threat detection.

36. Key Legal Distinctions

Security failure ≠ automatic civil liability

A regulatory violation and a private damages claim are separate questions.

Malfunction ≠ causation

A machine may have failed without causing the claimant's particular loss.

Security delay ≠ automatic Regulation 261 compensation

The precise cause and the airline's own subsequent decisions matter.

Airport responsibility ≠ airline responsibility

The responsible legal actor must be identified.

AI error ≠ AI legal personality

The liability normally attaches to the relevant operator, provider, manufacturer, contractor or other legally responsible person.

Security objective ≠ unlimited governmental power

Airport security can justify substantial controls, but fundamental-rights safeguards remain relevant.

37. Exam-Oriented Legal Test

For an airport-security technology malfunction claim, use:

S-C-R-D-L

S — Security standard
Was there a statutory/regulatory security requirement?

C — Compliance
Was the equipment and screening process compliant?

R — Responsibility
Who controlled the system?

D — Damage
What legally recognised damage occurred?

L — Link
Was the malfunction the legally sufficient cause of the damage?

38. Ultra-Basic Keyword Bank

Airport → Screening → Technology → Malfunction → Security Standard → Equipment → Operator → Contractor → Manufacturer → AI → Human Oversight → Delay → Causation → Damage → Passenger Rights → Privacy → Public Liability → Compensation

One-line formula:

SCREEN → FAIL → BREACH → CAUSE → DAMAGE → ATTRIBUTE → COMPENSATE

39. Conclusion

Airport security-screening technology malfunction claims in Europe operate through a multi-layered liability structure. Regulation 300/2008 establishes common aviation-security obligations and requires screening equipment to meet defined specifications and be capable of performing its security function. (EUR-Lex)

The 2025 Liège Airport Security judgment clarifies the distribution of supervisory responsibilities surrounding airport-security activities, while the 2026 European Air Charter judgment provides particularly important guidance on the relationship between airport-security shortcomings, airline decisions and causation. (EUR-Lex)

For an actual civil damages claim, however, the decisive questions normally remain:

What malfunction occurred? Who controlled the technology? What regulatory or civil duty was breached? Did the malfunction cause the claimant's loss? What damage is legally recoverable?

Thus, the central legal formula is:

REGULATORY DUTY → TECHNOLOGY FAILURE → OPERATIONAL RESPONSE → CAUSATION → DAMAGE → RESPONSIBILITY → REMEDY.