✈️ Unapproved and Bogus Aircraft Parts: The Invisible Risk That Can Bring Down a Flight

 

🧭 Introduction

In aviation, there is a silent rule that professionals understand very well:

👉 No part is allowed to fail.

Unlike other industries, where failures can be tolerated or corrected over time, aviation operates under a different reality —
a single compromised component can trigger a chain of irreversible events.

This is where two critical terms come into play:

• Unapproved Parts
• Bogus Parts

Both represent hidden threats to aircraft integrity — and ultimately, to human life.

⚙️ What Are Unapproved Parts?

Unapproved parts are components that lack proper regulatory approval for installation on an aircraft.

They may be genuine in origin — even manufactured by certified suppliers — but they fail to meet regulatory requirements established by authorities such as the Federal Aviation Administration or Brazil’s Agência Nacional de Aviação Civil.

Key characteristics:

• Missing or invalid certification (e.g., FAA Form 8130-3)
• Lack of traceability documentation
• Repairs or modifications performed outside approved facilities
• Genuine parts that became unairworthy due to:
  • Improper storage
  • Expired life limits
  • Unauthorized maintenance

📌 Critical insight:
A part doesn’t need to be fake to be dangerous —
lack of traceability alone makes it a risk.

🚨 What Are Bogus Parts?

Bogus parts represent a far more serious threat.

These are intentionally falsified or counterfeit components, designed to deceive maintenance personnel, operators, and regulators.

Typical characteristics:

• Forged tags, labels, and serial numbers
• Fraudulent certification documents
• Use of substandard materials
• Failure to meet structural and engineering specifications

👉 This is not error.
👉 This is fraud inside a safety-critical system.

⚠️ Real-World Cases: When Parts Become the Weak Link

🇺🇸 NTSB Case – Counterfeit Fasteners in Structural Components

Investigations linked to findings by the National Transportation Safety Board have identified situations where non-conforming or counterfeit fasteners were installed in aircraft structures.

In several cases:

• Bolts failed under normal operational loads
• Components detached or loosened over time
• Maintenance records failed to detect the issue

👉 The problem wasn’t immediate failure —
it was latent risk building silently.

🇺🇸 FAA SUP Program – A Systemic Warning

The FAA’s Suspected Unapproved Parts (SUP) program has documented thousands of reports involving:

• Counterfeit turbine engine components
• Fake bearings and seals
• Reused parts sold as new

👉 Many of these parts entered the supply chain through unauthorized distributors, often driven by cost reduction pressures.

🇧🇷 CENIPA Context – Maintenance and Component Failures

Although Brazilian investigations led by the Centro de Investigação e Prevenção de Acidentes Aeronáuticos (CENIPA) rarely focus solely on counterfeit parts, multiple reports highlight:

• Improper maintenance practices
• Installation of components outside approved standards
• Failures linked to lack of traceability or incorrect parts application

👉 In most cases, the part itself is only one link —
but it becomes decisive when combined with operational pressure.

🧠 The Chain of Events: Where It All Begins

Aviation accidents rarely result from a single failure.

They emerge from a sequence:

👉 Unverified component installed
👉 Undetected degradation
👉 Increased workload in flight
👉 Delayed or incorrect decision
👉 Loss of control or system failure

This is where unapproved and bogus parts become critical:

👉 They introduce risk before the aircraft even leaves the ground.

💰 The Economic Pressure Behind the Problem

There is an uncomfortable truth in aviation:

👉 Cost pressure creates vulnerability.

In times of financial stress, operators may:

• Seek cheaper suppliers
• Accept incomplete documentation
• Delay proper maintenance

This is where the system becomes exposed.

Aviation has a clear boundary:

👉 Cost efficiency must never cross into safety compromise.

🛡️ Prevention: How the Industry Protects Itself

🔎 Full traceability

Every installed component must have:

• Verified origin
• Maintenance history
• Regulatory documentation

🏭 Approved supply chain

Only certified vendors and repair stations are allowed.

📢 Reporting systems

Programs like the FAA SUP allow professionals to report suspicious parts — anonymously if necessary.

📌 Final Thoughts

Unapproved and bogus parts are among the most dangerous invisible threats in aviation.

They:

• Do not appear in flight instruments
• Do not trigger immediate alarms
• But can define the outcome of a flight

Safety in aviation is built on trust.

👉 Trust in procedures.
👉 Trust in people.
👉 And above all —
👉 trust in every single component installed on the aircraft.

👨‍✈️ Author

Marcuss Silva Reis is a commercial pilot, economist, aviation professor, and court-appointed aviation expert. He has decades of experience in aviation training, operations, and safety analysis, and is the founder of Instituto do Ar.