During compliance demonstration activities and over the life of the aerodrome, shortfalls / non-compliances against the aerodrome Certification Basis (CB) design requirements may be identified. Non-compliances against the CB should be examined for impact to certification and safety of flight operations. This page provides an overview of this process.

Where it is not reasonably practicable to change the aerodrome design OR where evidence cannot be generated to demonstrate compliance with a design requirement in the CB, the applicant should pursue approval for tailoring of the CB. Central to this tailoring process are the Military Aerodrome Certification Review Item (MACRI) and the Aerodrome Issue Paper (ADIP).

A MACRI is a document, which captures an Applicant’s proposal to modify an aerodromes provisional CB design requirement, and the Authorities approval of the change of the CB design requirement. There are two types of MACRI, an Equivalent Safety Finding (ESF) MACRI and an Exception MACRI. A MACRI should only be developed if it is not reasonably practicable to eliminate the risks through engineering / design changes. For details on the MACRI process, refer to Factsheet – Military Aerodrome Certification Review Item.

ADIP are used when an applicant identifies an enduring design deficiency which requires a risk treatment decision by Command. An ADIP usually underpins an Exception MACRI but may also be used to support an ESF MACRI. A safety argument should normally be used to support an ESF MACRI. However, if the safety argument is complex and the controls contentious, an ADIP can be used to capture the argument and controls and gain operator agreement. Factsheet Aerodrome Issue Paper describes what constitutes an ADIP, and illustrates the process for raising and processing an ADIP, including the roles of the Applicant / Person evaluating the non-compliance, and the roles of the Authority and Command.

By Approving an ADIP, DASA is providing assurance that the risk management is following the 7-Step SRM process and is defensible. By approving a MACRI DASA approves the tailoring of the CB. Once approved by DASA, any tailoring of the CB requirements should be captured in the CB Template (or another applicant specified template) with the corresponding MACRI information. For details on how to use the template to capture this information, refer to the User Guide – Certification Basis Template.

What We Do

DASA reviews all MACRIs and supporting ADIPs and will provide approval if the Authority is assured a credible and defensible safety argument or application of the SRM has been completed. The approval provides agreement to the change in the CB requirement.

How Do I Apply?

To discuss any potential shortfalls or non-compliances against the CB, DASA AHCERT should be engaged through

If a MACRI is the appropriate instrument to manage a non-compliance the applicant should submit a MACRI application to DASA via .

I Want To Learn More…

If you want to learn more about Aerodrome Non-Compliance Management, please consult the DASR 139 (Aerodrome) Regulations at DASR 139 Aerodromes and the following resources:

Guidance Material


DASR Forms



If you have questions about this topic please contact

For DASR queries please submit a DASR Query Form (DQF) Form 110

Related Content

DASA Web Page Certification Process and Programmes
DASA Web Page Demonstrate Compliance
DASA Web Page Aerodrome Design Changes