Civil Law and Aircraft Certification Defect Claims in Europe

1. Introduction

Aircraft certification defect claims arise when an aircraft, engine, component, software system, or other aeronautical product is alleged to have been improperly designed, manufactured, tested, maintained, approved, or certified, and that defect causes economic loss, property damage, injury, or death.

These disputes can involve several different defendants:

aircraft manufacturers;

engine manufacturers;

component manufacturers;

maintenance organisations;

design organisations;

production organisations;

lessors and sellers;

airlines/operators;

certification authorities;

national aviation authorities;

EASA;

persons issuing airworthiness or release certificates.

A crucial legal distinction must be made:

Certification is regulatory approval; it is not automatically a complete defence to a civil product-liability claim.

At the same time, a claimant normally cannot simply argue that because an accident occurred, the certificate itself was defective. The claimant must establish the relevant legal duty, defect or wrongful certification, causation, and recoverable damage.

European law therefore sits at the intersection of:

EU aviation safety law;

product liability;

contract law;

tort/delict law;

professional negligence;

airworthiness regulation;

insurance law;

international aviation law; and

procedural/jurisdictional rules.

2. What Is an Aircraft Certification Defect?

An aircraft certification defect may arise where:

A. Design defect

The aircraft design does not provide the level of safety required by applicable airworthiness standards.

Example:

An aircraft wing has a structural weakness that was not identified during certification.

B. Manufacturing defect

The approved design is safe, but a particular aircraft or component was manufactured incorrectly.

Example:

A batch of engine components contains a manufacturing flaw.

C. Certification defect

The regulatory approval itself is alleged to have been issued improperly.

Example:

The authority allegedly approved an aircraft without properly evaluating critical safety evidence.

D. Testing defect

Required testing was:

inadequate;

incorrectly performed;

based on erroneous data; or

improperly documented.

E. Maintenance/release defect

A maintenance organisation incorrectly certifies that an engine or component is serviceable.

F. Continuing-airworthiness defect

A problem develops after certification and the manufacturer or authority allegedly fails to issue an appropriate:

service bulletin;

airworthiness directive;

inspection requirement;

modification;

grounding instruction.

G. Certification-document defect

A certificate or release document contains a false or negligent statement.

The last category is particularly important in London Helicopters Ltd v Heliportugal.

3. European Regulatory Framework

Aircraft certification in Europe is principally influenced by the EU/EASA system.

Important areas include:

initial airworthiness;

type certification;

production;

continuing airworthiness;

maintenance;

design organisations;

production organisations;

airworthiness directives;

certification specifications;

approved modifications and repairs.

The older EU regulatory system has progressively been replaced by the EASA framework under Regulation (EU) 2018/1139 and associated implementing regulations.

The regulatory system is relevant to civil litigation because a court may need to determine:

What technical and regulatory standard applied when the aircraft or component was designed, manufactured, maintained or certified?

4. Product Liability Framework

Historically, European product liability has principally been based on the Product Liability Directive 85/374/EEC, implemented through national law.

A major development is Directive (EU) 2024/2853, which replaces the 1985 regime.

The new Directive applies to products placed on the market or put into service after 8 December 2026 following the 2026 corrigendum. It also expressly preserves national contractual and non-contractual liability rules alongside the Directive's defective-product regime. (EUR-Lex)

This is important for aircraft because modern aircraft contain:

software;

electronic systems;

connected components;

automated systems;

continuously updated digital systems.

The new product-liability framework is consequently relevant to future aircraft certification and software-defect disputes.

5. Core Elements of an Aircraft Defect Claim

A claimant generally needs to establish several elements.

5.1 Existence of a defect

The aircraft/component must be shown to be defective under the applicable legal test.

5.2 Applicable safety expectation

The court may examine:

certification specifications;

technical standards;

manufacturer's representations;

warnings;

maintenance instructions;

regulatory requirements;

foreseeable use.

5.3 Causation

The claimant must connect the defect with the loss.

For example:

design defect → structural failure → accident → damage

5.4 Damage

Possible damage includes:

death;

bodily injury;

aircraft destruction;

component damage;

repair costs;

loss of use;

consequential economic loss, depending on applicable law.

5.5 Defendant's legal responsibility

The responsible person may be:

manufacturer;

seller;

maintenance organisation;

certification organisation;

operator;

authority.

6. Certification Does Not Automatically Eliminate Product Liability

This is one of the most important principles.

Suppose an aircraft has received a valid certificate of airworthiness.

Later, evidence shows:

The aircraft had a hidden structural design defect.

The manufacturer cannot necessarily argue:

"The authority certified it, therefore there can be no civil liability."

Certification establishes regulatory compliance within the relevant certification framework. A civil court may still have to examine:

contractual warranties;

manufacturer's representations;

product defect;

negligence;

failure to warn;

causation.

The distinction is particularly visible in the jurisprudence involving defective aircraft and engines.

7. Case Law

Case 1 — Airbus SAS v Generali Italia SpA, [2019] EWCA Civ 805

Court: Court of Appeal of England and Wales
Date: 14 May 2019

This is one of the most directly relevant European cases for aircraft-manufacturer liability.

The dispute arose after an Airbus aircraft operated by Alitalia suffered damage while landing in Rome.

Airbus had entered into an Airframe Warranties Agreement containing warranties concerning defects in material, workmanship and design.

The insurers pursued proceedings in Italy concerning losses connected with the aircraft incident. Airbus argued that the contractual arrangements required the dispute to be dealt with in England.

The English Court of Appeal examined the relationship between the alleged non-contractual claims and the contractual aircraft warranties.

The contractual warranties essentially provided that aircraft and warranted parts would, on delivery, be free from defects in:

material;

workmanship;

design; and

conformity with specification.

The warranties also contained important limitations concerning the remedies available to the buyer. (vLex)

Importance

This case shows that an aircraft defect dispute may be governed substantially by contractual warranty provisions, even when the claimant characterises the case as negligence or another non-contractual claim.

Principle

The court must examine the contractual architecture surrounding aircraft certification, manufacture and warranties rather than treating every defect claim as an independent tort claim.

8. Case 2 — London Helicopters Ltd v Heliportugal LDA-INAC, [2006] EWHC 108 (QB)

Court: High Court of England and Wales
Date: 9 February 2006

This is a particularly valuable case concerning airworthiness certification documentation.

A Portuguese company performed work on a helicopter engine and issued a JAA Form One Authorised Release Certificate.

The certificate stated, among other things, that:

the engine was serviceable;

the work had been performed according to the relevant maintenance manual;

the work complied with JAR requirements; and

the engine was considered ready for release to service.

The engine subsequently caused problems.

London Helicopters alleged that the certificate contained negligent misstatements and that it had relied upon the certificate in transactions involving the engine. (vLex)

The case primarily concerned jurisdiction, rather than a final determination of whether the certificate was actually defective.

The court held that, for jurisdictional purposes, England could constitute the place where the claimant suffered the relevant damage because the certificate was received and relied upon there. Portugal was the place from which the allegedly negligent certification originated. (vLex)

Importance

This case demonstrates that certification documents can have independent legal significance.

A certificate may become relevant to:

negligent misstatement;

reliance;

contractual transactions;

tort liability;

jurisdiction.

Principle

An inaccurate airworthiness or release certificate can potentially create civil consequences independently of the physical defect in the aircraft or engine.

9. Case 3 — Wallentin-Hermann v Alitalia, C-549/07

Court: Court of Justice of the European Union
Date: 22 December 2008

This case concerned an aircraft technical problem and passenger compensation under Regulation 261/2004.

The CJEU considered whether a technical problem constituted an "extraordinary circumstance."

The Court distinguished ordinary technical problems from hidden manufacturing defects.

It held that ordinary technical problems arising during aircraft maintenance are generally inherent in the normal exercise of an airline's activity.

However, the Court expressly recognised that a hidden manufacturing defect affecting flight safety, revealed by the manufacturer or competent authority after aircraft entered service, may be outside the carrier's normal control. (Infocuria)

Why this matters for certification defects

Although the case was not a manufacturer's product-liability action, it provides important judicial recognition of the legal significance of a hidden aircraft manufacturing defect.

Principle

A hidden safety-related manufacturing defect can be legally distinguished from ordinary maintenance failures.

This distinction can be useful when determining whether responsibility belongs primarily to:

the operator;

the maintenance organisation;

the manufacturer; or

another actor.

10. Case 4 — Finnair Oyj v Keskinäinen Vakuutusyhtiö Fennia, C-832/18

Court: CJEU

The case involved the failure of an aircraft component and whether the failure could constitute an extraordinary circumstance under Regulation 261/2004.

The aircraft manufacturer had issued technical information concerning a hidden manufacturing/design problem involving rudder steering servos.

The Court considered whether the failure of an "on condition" component should be treated as part of the ordinary operation of an airline. (EUR-Lex)

The CJEU stated that premature failure of an aircraft part will ordinarily be connected with the operation of the aircraft, but the analysis changes where the problem represents a hidden manufacturing defect of the kind identified by the manufacturer.

Importance

This case helps separate:

ordinary component failure

from

hidden manufacturing/design defect.

Certification relevance

Where a defect existed before delivery but was not discoverable through the normal certification/maintenance process, the claimant may need technical evidence showing:

when the defect originated;

whether it existed at manufacture;

whether it should have been discovered;

whether the applicable certification process should have identified it.

11. Case 5 — D. v LOT Polish Airlines, C-411/23

Court: CJEU
Judgment: 13 June 2024

This is one of the most important recent cases concerning aircraft engine design defects.

The underlying proceedings arose after an engine design defect was discovered during an emergency inspection.

The CJEU considered whether the detection of a hidden engine design defect could amount to an extraordinary circumstance under Regulation 261/2004.

The Court held that a hidden defect in the design of an aircraft engine can constitute an extraordinary circumstance even where the engine manufacturer had informed the airline of the existence of such a defect months earlier. (EUR-Lex)

The Court nevertheless stressed that the carrier must take appropriate reasonable measures once the circumstances become known.

Important distinction

The case does not decide that the engine manufacturer is automatically civilly liable.

Instead, it establishes that the existence of a hidden design defect can be legally distinguished from ordinary aircraft maintenance problems.

Civil-law relevance

Evidence concerning:

manufacturer warnings;

technical instructions;

defect reports;

engine design;

inspection requirements;

modification instructions

may become important in a later civil-liability action.

12. Case 6 — A v Finnair Oyj, C-385/23

Court: CJEU

This is another important recent decision concerning a hidden design defect in a new aircraft model.

The aircraft was relatively new when a fuel-gauge failure occurred. Subsequent investigation showed that the failure resulted from a hidden design defect affecting aircraft of the same type.

The Court held that an unexpected and unprecedented technical failure involving a new aircraft model can constitute an extraordinary circumstance when the manufacturer subsequently identifies a hidden design defect affecting flight safety. (EUR-Lex)

Importance

This provides strong evidence that European aviation law distinguishes between:

ordinary operational malfunction

and

latent design defect affecting the aircraft type.

Civil-law significance

For a civil defect claim, the facts may support investigation into:

type certification;

design assumptions;

safety analysis;

manufacturer knowledge;

defect reporting;

corrective action;

continuing airworthiness.

13. Case 7 — Huci v Romania, Application No. 55009/20

Court: European Court of Human Rights
Judgment: 16 April 2024

This case involved the death of a passenger in the crash of an uncertified small ultralight aircraft during a test flight conducted as part of a certification procedure.

The ECHR examined the State's procedural obligations under Article 2 of the Convention.

The Court found no violation of the procedural limb of Article 2 on the facts presented. The investigation had examined the circumstances of the accident and identified responsibility for the accident, although the criminal investigation ultimately ended because of limitation. (ECHRCaseLaw)

Importance

The case demonstrates that aircraft certification disputes can have a human-rights and State-investigation dimension, particularly after a fatal accident.

The case also shows that:

Certification status, accident investigation and individual civil/criminal responsibility are legally related but distinct questions.

14. Case 8 — Techniko Epimelitirio Elladas (TEE) and Others, C-271/11

Court: CJEU
Judgment: 8 November 2012

This case concerned the EU rules governing continuing airworthiness of aircraft and the qualifications of personnel involved in inspection.

The Court interpreted Regulation 2042/2003 and held that Member States could distribute inspection tasks among specialised categories of inspectors, provided the regulatory requirements were respected.

The Court also considered the experience requirements for persons responsible for aspects of aircraft airworthiness inspection. (EUR-Lex)

Importance

This case is not a damages judgment against an aircraft manufacturer.

Its importance lies in defining the regulatory standard governing continuing airworthiness inspections.

That standard can become relevant evidence in later civil litigation.

Principle

Regulatory airworthiness requirements can help establish the standard against which inspection and certification conduct is assessed.

15. Case 9 — Huci v Romania and the Certification-Accident Connection

The Huci decision deserves additional emphasis because it illustrates the special evidentiary problems surrounding certification.

Where an aircraft crashes during a certification or test process, the investigation may need to establish:

whether the aircraft was certified;

what certification stage had been reached;

who was responsible for the aircraft;

what inspections were performed;

what technical defects existed;

whether the defect was known;

whether warnings were issued;

whether the pilot/operator contributed to the accident.

The ECHR's treatment confirms the importance of an effective investigation into the circumstances and possible responsibility following an aviation death. (ECHR-KS)

16. Case 10 — General Court Litigation Concerning EASA Certification Powers

European courts have also considered challenges concerning EASA's exercise of its airworthiness powers.

In litigation concerning EASA's response to an aircraft airworthiness issue, the General Court examined allegations involving:

Regulation 1702/2003;

EASA's regulatory powers;

alleged failure to exercise those powers;

burden of proof;

good administration;

transparency;

legal certainty. (EUR-Lex)

This type of case is important because it demonstrates that certification decisions are subject to legal controls and procedural principles, although such proceedings are different from a private damages action.

17. Classification of the Case Law

It is useful to divide the cases into three groups.

This distinction is important because European reported case law specifically awarding damages for an "aircraft certification defect" is much smaller than the broader body of aviation technical-defect litigation.

18. Certification Versus Defect

A central legal distinction is:

Certification question

Did the aircraft satisfy the regulatory requirements for certification?

Product-liability question

Was the aircraft nevertheless defective?

Negligence question

Did a manufacturer, maintenance organisation, inspector or authority breach a duty of care?

Contract question

Did the aircraft fail to comply with contractual warranties or specifications?

Public-law question

Did the certification authority lawfully exercise its regulatory powers?

One event can potentially generate all five questions.

19. Example

Suppose an aircraft is certified as airworthy in 2024.

In 2026, the aircraft suffers a structural failure.

An investigation discovers a hidden manufacturing defect.

There could be several separate claims:

Against manufacturer

The aircraft contained a manufacturing/design defect.

Against maintenance organisation

Required inspections were not properly performed.

Against certification organisation

The organisation allegedly failed to comply with its regulatory inspection obligations.

Against authority

The authority allegedly failed to perform a legally required regulatory function.

Against seller

The aircraft breached contractual warranties.

The existence of the certificate does not automatically answer all five questions.

20. Product Liability and the Defect Test

Traditional EU product-liability law focuses on whether the product was defective, broadly asking whether it failed to provide the safety which a person was entitled to expect.

For an aircraft, the assessment can involve:

intended use;

foreseeable use;

technical characteristics;

safety standards;

warnings;

time of placing on the market;

state of scientific and technical knowledge.

Aircraft present an unusually sophisticated situation because the product is highly regulated.

Therefore, courts may examine regulatory certification evidence while still conducting an independent civil-liability analysis.

21. New EU Product Liability Directive

Directive (EU) 2024/2853 significantly modernises European product liability.

It is particularly relevant to aircraft because modern aviation products increasingly incorporate:

software;

digital systems;

artificial intelligence;

connected components;

cybersecurity functionality;

updates.

The new Directive applies to products placed on the market or put into service after 8 December 2026. (EUR-Lex)

It also makes clear that it does not remove rights arising under national contractual or non-contractual liability law. (EUR-Lex)

Practical consequence

Future aircraft claims may involve both:

physical defect

and

software/digital defect.

22. Software Certification Defects

Modern aircraft may depend on software controlling:

flight management;

navigation;

engine management;

flight-control systems;

collision avoidance;

monitoring systems.

A software defect could theoretically produce:

software design error → incorrect aircraft behaviour → accident → damage

The legal question becomes whether the problem constitutes:

defective product;

negligent software development;

inadequate certification;

inadequate warning;

failure to update;

failure of continuing airworthiness.

The new EU product-liability framework becomes particularly relevant to these future disputes.

23. Manufacturer's Duty to Warn

A defect may not always consist of a physically defective component.

The problem may instead be:

The manufacturer knew of a risk but failed to provide an adequate warning.

Possible evidence includes:

technical bulletins;

service letters;

engineering reports;

accident investigations;

communications with EASA;

communications with national aviation authorities;

operator notices.

The later discovery of a defect can therefore become highly important evidence regarding what the manufacturer knew and when it knew it.

24. Continuing Airworthiness

Certification is not necessarily a one-time event.

Aircraft must remain airworthy during their operational life.

Therefore, a defect claim may involve failure to:

identify a known defect;

inspect aircraft;

issue technical information;

modify an aircraft;

replace a component;

ground aircraft where appropriate;

comply with an airworthiness directive.

The TEE judgment illustrates the importance of EU rules concerning continuing airworthiness and inspection responsibilities. (EUR-Lex)

25. Manufacturer Knowledge

A major factual question is:

When did the manufacturer know or reasonably have the ability to know about the defect?

Consider three stages:

Stage 1 — Unknown defect

No reasonable technical information revealed the problem.

Stage 2 — Emerging defect

Several incidents begin to indicate a common problem.

Stage 3 — Known defect

The manufacturer or authority identifies the systemic defect.

The legal consequences can differ substantially between these stages.

The CJEU's hidden-design-defect cases demonstrate why the timing of discovery and manufacturer notification matters. (EUR-Lex)

26. Role of Expert Evidence

Aircraft certification claims are highly technical.

Expert evidence may address:

structural engineering;

aerodynamics;

engine engineering;

avionics;

software;

certification standards;

maintenance procedures;

accident reconstruction;

human factors.

A claimant may need to demonstrate:

technical defect + regulatory deviation + causation + damage.

A court normally cannot determine complicated engineering issues simply from the existence of an accident.

27. Burden of Proof

The burden of proof depends upon the particular legal cause of action.

For example:

Contract claim

The claimant may need to prove:

contract;

warranty;

breach;

loss.

Negligence claim

The claimant generally needs to establish:

duty;

breach;

causation;

damage.

Product-liability claim

The claimant must establish the elements required by the applicable product-liability regime, including defect and causation.

Challenge to certification decision

The claimant may instead need to satisfy the procedural requirements for judicial review or annulment.

Therefore:

There is no single universal burden of proof for every aircraft certification dispute.

28. Certification Authority Liability

Claims against a public aviation authority are particularly complicated.

A claimant might allege:

"The authority negligently certified the aircraft."

The court may need to determine:

whether the authority had a statutory duty;

whether the duty is owed to the claimant;

whether the authority enjoys statutory immunity;

whether the decision is subject to judicial review;

whether the conduct was regulatory or operational;

whether national State-liability law permits damages;

whether causation can be established.

Therefore, a claim against an aviation authority is legally different from a claim against Airbus, Boeing, an engine manufacturer, or a maintenance organisation.

29. Civil Liability of Maintenance Organisations

A maintenance organisation may become liable where it:

incorrectly repairs a component;

releases a defective engine;

falsely certifies work;

fails to comply with maintenance standards;

fails to identify a known defect.

London Helicopters v Heliportugal is particularly useful because the dispute concerned statements made in a formal aviation release certificate. (vLex)

30. Importance of the Certificate as Evidence

An aircraft certificate may provide evidence of:

compliance;

inspection;

maintenance;

serviceability;

authorised release;

conformity with technical requirements.

But the evidentiary weight of a certificate depends on the legal issue.

A certificate may be strong evidence that:

a regulatory procedure was completed.

It does not necessarily prove that:

no hidden defect existed.

The CJEU's hidden-defect jurisprudence illustrates precisely this distinction. (Infocuria)

31. Causation Problems

Aircraft accidents frequently have multiple potential causes.

For example:

manufacturing defect
↓
maintenance failure
↓
pilot response
↓
accident

A manufacturer may argue that:

maintenance caused the failure;

operator modification caused the problem;

pilot conduct was the dominant cause;

another component failed first.

The claimant therefore needs to establish the causal connection between the alleged certification/design defect and the actual loss.

32. Contributory Negligence

A claimant's own conduct may affect recovery under applicable national law.

Examples:

failure to follow maintenance instructions;

unauthorised modification;

improper operation;

failure to comply with warnings;

continued use after a known defect.

However, the precise effect depends on the governing national law.

33. Contractual Warranty Claims

Aircraft purchase agreements frequently contain extensive warranty provisions.

Airbus v Generali demonstrates how these provisions can become central to disputes concerning aircraft defects. The relevant Airbus warranties addressed defects in material, workmanship and design and contained limitations concerning remedies and duration. (CaseNode)

Thus, an aircraft purchaser should examine:

warranty period;

defect definition;

exclusive remedies;

repair/replacement obligations;

consequential-loss exclusions;

jurisdiction clause;

arbitration clause;

governing law.

34. Insurance Claims

Aircraft certification defects can also generate insurance litigation.

Potential insurance issues include:

hull insurance;

aviation liability insurance;

product liability insurance;

manufacturer insurance;

subrogation;

contribution between insurers.

The Airbus v Generali litigation illustrates how aircraft damage can generate disputes involving insurers and the manufacturer's contractual arrangements. (vLex)

35. Limitation and Long-Tail Liability

Aircraft can remain in service for decades.

Consequently, a defect may be discovered many years after manufacture.

Potential legal barriers include:

limitation periods;

product-liability long-stop periods;

contractual limitation clauses;

statutes of repose in national law;

causation difficulties;

evidence deterioration.

The applicable law is particularly important because limitation rules differ among European jurisdictions.

36. Certification Defect vs Manufacturing Defect

One accident can involve both.

37. Certification Defect vs Design Defect

A design defect means:

The underlying design was unsafe or failed the applicable requirements.

A certification defect means:

The approval process allegedly failed to properly assess or apply the applicable requirements.

They are not identical.

For example:

Unsafe design + correct certification process
→ possible manufacturer/design claim.

Safe design + erroneous certification procedure
→ potential regulatory/certification issue.

Unsafe design + inadequate certification
→ potentially both.

38. Important Evidentiary Documents

In litigation, the following documents may become extremely important:

type certificate;

certificate of airworthiness;

design approval;

production approval;

JAA Form One/EASA Form 1;

maintenance release;

inspection records;

service bulletins;

airworthiness directives;

engineering reports;

manufacturer correspondence;

accident investigation reports;

flight-data recorder information;

maintenance logs;

certification test results.

39. Remedies

Depending on the cause of action, possible remedies include:

1. Damages

For:

physical injury;

death;

property damage;

qualifying economic loss.

2. Repair

Correction of defective aircraft/component.

3. Replacement

Replacement of defective components.

4. Contractual warranty relief

Where the purchase agreement provides a specific remedy.

5. Declaration

A court may determine rights under a contract or certification-related relationship.

6. Regulatory review

A certification decision may potentially be challenged through the appropriate administrative/judicial mechanism.

7. Contribution and indemnity

Multiple defendants may seek allocation of responsibility.

40. Major Legal Principle From the European Cases

The cases collectively establish a useful distinction:

Aircraft certification, aircraft operation, aircraft maintenance and aircraft product liability are interconnected but legally separate fields.

For example:

London Helicopters shows the significance of certification documents in civil claims. (vLex)

Airbus v Generali shows the importance of contractual warranties and jurisdiction. (CaseNode)

Wallentin-Hermann distinguishes ordinary technical failures from hidden manufacturing defects. (Infocuria)

Finnair develops the hidden-defect analysis for aircraft components. (EUR-Lex)

D v LOT applies the distinction to a hidden engine design defect. (EUR-Lex)

A v Finnair addresses a hidden design defect affecting a new aircraft type. (EUR-Lex)

Huci demonstrates the separate State-investigation dimension of an accident involving an uncertified aircraft. (ECHR-KS)

TEE demonstrates the importance of continuing-airworthiness inspection rules. (EUR-Lex)

41. Case-Law Summary

42. Short Hypothetical

Assume an airline purchases a new aircraft.

The aircraft receives all required certificates.

Two years later, its engine fails.

Investigation reveals that the engine had a latent design defect.

Possible claims

Against manufacturer:
Defective design/product liability.

Against seller:
Breach of contractual warranty.

Against maintenance organisation:
Failure to identify or correct the defect, if applicable.

Against certification organisation:
Potential negligence/regulatory liability, subject to applicable law and immunity.

Against aviation authority:
Potential public-law/State-liability claim if the relevant legal requirements are satisfied.

Important evidence

type-certification records;

engineering data;

manufacturer warnings;

service bulletins;

maintenance records;

inspection records;

accident investigation;

expert engineering evidence.

43. Exam-Oriented Conclusion

Aircraft certification defect claims in Europe are multidisciplinary civil-liability disputes. A valid certificate establishes an important regulatory fact, but it does not automatically resolve whether the aircraft was defective, whether a manufacturer breached a contractual warranty, whether a maintenance organisation negligently issued a release certificate, or whether an authority acted unlawfully.

The most directly relevant case is London Helicopters v Heliportugal, because it demonstrates how an aviation release certificate itself can become the basis of a civil negligent-misstatement dispute. (vLex) Airbus v Generali demonstrates the importance of contractual aircraft warranties and jurisdictional clauses in manufacturer-defect litigation. (CaseNode)

The CJEU's Wallentin-Hermann, Finnair, D v LOT and A v Finnair decisions provide a coherent body of European jurisprudence distinguishing ordinary aircraft technical failures from hidden manufacturing and design defects affecting flight safety. (Infocuria)

The newer EU Product Liability Directive is also significant for future aircraft disputes because it applies to products placed on the market or put into service after 8 December 2026, bringing modern product-liability rules into a technological environment increasingly involving software and connected systems. (EUR-Lex)

Ultra-short revision

Aircraft certification defect = Certification + airworthiness + product defect + contractual warranty + negligence + causation + damage.

Key cases:
London Helicopters → certification certificate/reliance
Airbus v Generali → aircraft warranty
Wallentin-Hermann → hidden manufacturing defect
Finnair → component/design defect
D v LOT → engine design defect
A v Finnair → new aircraft hidden design defect
Huci → uncertified aircraft and State investigation
TEE → continuing airworthiness standards.