GM 21.A.609(c) and (d) Obligations of holders of UKTSO authorisations

CAA ORS9 Decision No. 48

In CS-UKTSO, there is no specification related to ICA, either in Subpart A, or in each specific UKTSO.

Although a UKTSO article itself typically does not require ICA, the applicable airworthiness standards may require the design approval holder (DAH) or the design approval applicant (DAA) who install a UKTSO article into their product to develop ICA that describe a UKTSO article’s installation requirements, within the context of the product, to the extent necessary to ensure the product’s continued airworthiness.

In addition, if the DAH or the DAA who install a UKTSO article into their product explicitly uses UKTSO provisions to demonstrate compliance with an installation requirement, they should review all the maintenance and inspection instructions for the particular UKTSO article when defining the ICA of the product.

It may be necessary for the DAH or the DAA to incorporate these instructions into the ICA of the product to ensure that the UKTSO article continues to satisfy the terms of its UKTSO authorisation after installation.