POSTED ON February 28, 2020
The CAR and CASR vest specific regulatory powers which include approvals of designs for aircraft and aeronautical products. The regulations also recognise that in certain circumstances, it may be appropriate for suitable industry personnel to exercise some of these powers, achieved through the issue of Instrument of Appointments (IoAs). These IoAs are issued under CAR 6 and CASR 201.001.
An applicant for an IoA to carry design approval functions may apply for appointment in one or more of the following engineering specialities:
CASR Part 21 subpart M replaces the old CAR (1988) Regulations 35 and 36 by codifying in the statutes a number of concepts that were previously expectations of standard practices under the old regulations. These include a number of formal definitions:
The process for approval of a design is now much more rigorously defined in the statutes and closely aligned to the EASA Part 21 Subpart M (and J) requirements.
The following figure illustrates at a very high level the inputs, process and outputs of approval in accordance with CASR 21M:
The key features of the CASR21M approval process are:
Once approved, the Technical Data is held by the Design Approval Holder for the life of the modification/repair. The DAH has responsibilities to ensure that support is available to the Registered Operators in relation to continued airworthiness of the modification/repair. As it is possible the mod/repair may remain in service longer than the DAH may remain in business, the DAH may enter into a contract with another suitable organisation to transfer that responsibility as defined in CASR 21.450.
The reason for this is that there is only one DAH for a particular design approved under CASR21M and the ‘Owner’ of that design needs to be immediately identifiable to both Registered Operators and CASA. Should there be no organisation acting in the role of DAH then the approval of the design may be suspended.
As is the norm in Europe with approvals made by EASA 21J organisations, the Applicant and Design Approval Holder are generally the same entity for the purposes of applying CASR21M unless there is a contract with a Client specifying otherwise.