Frequently Asked Questions

Q: What is the ASD-STANdardisation procedure ?

A: ASD-STAN procedures are detailed in this section of this website, and include a Standardisation Process Manual, New Work Proposal and a Comments form

Q: What is the status of an ASD-STAN standard ?

A: In its capacity as an Associated Body of CEN, ASD-STAN delivers ASD-STAN prEN standards to the Aerospace sector. A mutual agreement between CEN and ASD-STAN allows for the pre-issuance of ASD-STAN publications to meet the timely requirements of the European Aerospace industry for early access to European standards. It’s important to note that ASD-STAN prENs are technically identical, containing exactly the same technical content as subsequent EN publications released by CEN members.

Q: What are the benefits of having an EN ?

A: Upon ratification, the production of an EN standard entails:

  • Withdrawal of Competing National Standards: All competing National Standards are withdrawn by National Associations within a six-month period.
  • Incorporation into European Legislation: The EN standard gains the potential for incorporation into European legislation, thereby strengthening its significance and relevance.
  • Cost-Efficient Certification: ASD-CERT is then enabled to provide certification services to the industry at a significantly reduced cost.

Q: When the EN version published by CEN is available?

A: Following a 6-month evaluation period, the ASD-STAN prEN undergoes transformation into a CEN EN, with a preparation duration of 5.5 to 8.5 months. The entire process, from ASD-STAN publication to CEN EN release, spans between 11.5 to 14.5 months. However, the distribution of the CEN EN by its members typically occurs 2-6 months later, reflecting internal publication processes within these member organizations.

Q: Can ASD-STAN publication be used for training and/or certification activities?

A: Certainly, ASD-STAN prEN publications are suitable for any training and certification activity. Importantly, there is no difference in the technical content between the ASD-STAN prEN publication and the subsequent CEN EN publication. ASD-CERT ( actively conducts certification and qualification activities based on ASD-STAN prEN publications.

Q: Which EN publications are originated from ASD-STAN?

A: ASD-STAN serves as the originator for all CEN EN publications falling within the range of EN 2000 to EN 9999..

Q: How is ASD-STAN involved in the CEN work?

A: ASD-STAN, as an associated body to CEN, oversees the CEN Technical Committee for Aerospace (CEN TC Aerospace) and assumes responsibility for all CEN EN publications within the range of EN 2000 to EN 9999. Harmonizing its efforts, ASD-STAN collaborates closely with other CEN and ISO committees, as well as various standardization organizations. For more information, refer to the ASD-STAN presentation available at

Q: Our Auditor is referring to the EN publication as the only valid publication to do the Audit. What can I do?

A: The ASD-STAN prEN stands as an early release of the CEN EN, serving as a precursor to the CEN EN, which is essentially a later redistribution of the ASD-STAN publication featuring a CEN coversheet. Importantly, ASD-STAN prENs are technically identical, containing exactly the same content as subsequent EN publications released by CEN members.

These ASD-STAN prEN publications are not only suitable for any training and certification activity but also find acceptance by various regulatory authorities. ASD-STAN actively engages in discussions with these authorities, and there is a consensus to recognize and accept ASD-STAN prENs in lieu of older EN versions. This recognition extends to updating references to the latest available publication, even if it is an ASD-STAN prEN publication.

Q: What does ASD-STAN prEN mean?

A: ASD-STAN prEN means ASD-STAN projected EN. ASD-STAN prENs are technically identical (with exactly the same content) to the further EN publications by the members of CEN.

Q: What is the difference between an ASD-STAN prEN and a CEN prEN?

A: A CEN prEN is a preliminary draft document crafted by ASD-STAN working group and submitted to CEN members for the CEN Enquiry phase (happening in parallel to ASD-STAN NDB ballot). Consequently, the ASD-STAN working group utilizes and distributes its drafted documents for the CEN Enquiry (distributed at CEN as prENs). These drafts are clearly marked as preliminary documents/drafts in their current state.

Q: Which purchase possibilities for a standard we propose?

 A: Clients can conveniently purchase standards directly from our web-shop using a credit card or PayPal. To make a purchase, simply enter the desired standard number in the search area. On the result page, select the standard, add it to the basket, and proceed to the checkout page. Provide necessary information such as Name/Surname and email address (where you will receive an electronic purchase invoice). Include your company’s VAT number to avoid VAT tax, and carefully input billing details to ensure the invoice covers all necessary information. Accept our Terms and Conditions by pressing “Show Terms” and then click the “Purchase” button. Upon completion, you will receive the invoice via email, containing a link to the purchased standard (all standards are in PDF format). By clicking the link, you can download the standard to your computer.

Alternatively, if the web-shop option does not align with your company policy, you can purchase a standard by contacting our Sales department via email at  . Provide your company details (company name, address, VAT number, person in charge, desired standard, and quantity) for issuing a pro-forma invoice. Once the pro-forma invoice is settled by bank transfer, we will send you a final invoice along with the PDF standard via email.

Q: How to download a purchased standard?

A: Upon completion of the purchase process, an electronic invoice will be sent to the email address provided. This invoice will include a link, allowing you to click and download the purchased standard.

Q: Is it necessary to add the VAT number to the billing details? What is an Intra-Community VAT number?

A: To ensure exemption from VAT on your bill, it is essential to include your VAT number during the purchase process. Even if you possess an Intra-Community VAT number, failure to provide it will result in the imposition of VAT charges.

European companies, subject to VAT in a Member State, utilize an intra-Community VAT number for trade exchanges with companies in other Member States. This unique identifier not only facilitates the charging of VAT in Europe but also enables VAT exemption when invoicing. It is imperative that the VAT number appears on the invoice in such cases.

Q: How long does it take to get the purchase invoice and a standard?

A:Making an online purchase through our website is a swift and seamless process. It operates automatically—once you press the “Confirm Purchase” button, you instantly receive the invoice containing the link to access the standard.

For bank transfers or payments made by invoice, the timeline is contingent on the client’s promptness. Once the payment is completed, we promptly dispatch the standard via email. Typically, the entire process takes approximately 3 to 5 days when all tasks are accomplished in a timely manner by both parties.

Q: Some organisations require a “Bank Identification document” to add the supplier in the system and to proceed with the order. Can ASD-STAN provide such a document?

A: If the client requires the “Bank Identification document,” it can be readily provided without any hassle. To request this document, please send your inquiry to  .