Do You Need AS9100 to Supply into Aerospace & Defence?

If you’re asking this question, there’s a good chance the answer has already started to form around you.

A customer has mentioned it; a tender has referenced it; or you’ve seen it listed as a requirement to get onto an approved supplier list.

At that point, the question becomes less theoretical and more practical.

Do we actually need this?

In most cases, the answer is yes.

If you want to supply into the Aerospace sector - particularly to OEMs, Primes, or Tier 1 suppliers - AS9100 certification is not optional; it is an expected baseline.

But as with most things in Aerospace, the detail matters.

Why AS9100 Exists

The Aerospace supply chain is built on trust.

When components are being fitted to aircraft, satellites, or defence systems, there is no margin for error. Every part must be controlled, traceable, and produced consistently within a defined system.

AS9100 exists to provide that assurance.

It allows organisations further up the supply chain to place work with confidence, knowing that their suppliers are operating to a recognised and controlled standard.

It is not simply a quality badge. It is a structured way of demonstrating that your business can perform in a high risk, highly regulated environment.

Without that assurance, the risk is simply too high.

When AS9100 Becomes a Requirement

For most businesses, AS9100 is not something they proactively choose to pursue. It is something they are required to have in order to progress.

This typically happens when a business begins supplying parts that go directly onto an aircraft or Aerospace system, or when it engages with Tier 1 or Tier 2 suppliers who are themselves accountable to OEMs and Primes.

In these situations, AS9100 is often written directly into supplier approval processes. It appears in tenders, contracts, and onboarding requirements.

Without it, the business may be unable to quote, tender, or even begin discussions around supplying.

At that point, certification is no longer a strategic option. It becomes a commercial necessity.

Where ISO 9001 Fits In

Many businesses entering Aerospace already have ISO 9001 in place, which provides a solid foundation.

However, ISO 9001 on its own is rarely sufficient.

While it demonstrates that a quality management system exists, it does not go far enough to meet the specific expectations of the Aerospace industry.

AS9100 builds on that foundation by introducing greater control in areas such as traceability, product safety, risk management, and supplier oversight.

From a customer’s perspective, the distinction is important.

ISO 9001 shows that you have a structured approach to quality.AS9100 shows that you can operate within the aerospace supply chain.

That difference is what drives the requirement.

Are There Situations Where You Don’t Need It?

There are scenarios where AS9100 may not be strictly required, but they are more limited than many expect.

For example, businesses that sit several tiers removed from the Aerospace supply chain, or those providing non critical services with no impact on product quality, may not be asked to achieve certification.

In some cases, customers may accept ISO 9001, or no formal certification at all.

However, even in these situations, the direction of travel is usually clear.

As businesses move closer to the product, or begin working with more demanding customers, expectations increase.

Many organisations choose to pursue AS9100 proactively, not because it is immediately required, but because it strengthens credibility, opens access to highe value work, and positions them for future opportunities.

Where Businesses Often Go Wrong

The challenge is not usually in deciding whether AS9100 is needed. It is in how businesses approach it.

A common mistake is to treat AS9100 as a documentation exercise.

Systems are built around templates rather than operations, with the aim of achieving certification as quickly as possible.

While this approach can create the appearance of compliance, it rarely holds up in practice. The result is often a system that passes audit but does not reflect how the business actually runs.

That disconnect becomes a problem over time.

Processes are not followed consistently; teams lose confidence in the system; audits become more difficult rather than easier.

The issue is not the standard itself - it is how it has been implemented.

What a Strong AS9100 System Looks Like

When AS9100 is implemented properly, it does not complicate the business - it clarifies it.

Processes are strengthened rather than replaced; control is improved without unnecessary bureaucracy; teams understand how the system supports their work; and the organisation is able to demonstrate, clearly and consistently, that it is operating as intended.

That is what creates confidence - both internally and within the wider supply chain.

Final Thought

If you have been told you need AS9100, you are not alone.

Most businesses enter the Aerospace sector in exactly this way - responding to a requirement rather than planning for it from the outset.

The difference is in how that requirement is handled.

Approached properly, AS9100 becomes a tool that strengthens the business and opens access to new opportunities. Approached poorly, it can introduce complexity without adding real value.

This is exactly the challenge we deal with every day at Vaelo Aerospace - helping businesses understand what is required, position themselves correctly within the supply chain, and build systems that stand up to both audit and real world operation.