Proposed amendment to Part 121 MOS to replace expiring provisions and make minor changes - some relevant to Part 135 - (CD 2522OS)
Change 8 - Amend definition of TAWS Class-A and TAWS Class-B (relevant to Part 121, 135, 121.Z and CASA EX74/24 operations)
Policy Aim
Allow aeroplanes required to be fitted with Terrain Awareness and Warning System (TAWS) Class-A and TAWS-Class B that are (E)TSO-C151a, as well as the (E)TSO-C151b and subsequent versions.
Proposed Policy
We propose to amend the definitions of TAWS Class-A and TAWS-Class B in section 11.24 of the Part 121 Manual of Standards to refer to (E)TSO-C151a and subsequent versions in place of (E)TSO-C151b and subsequent versions.
As the CASR Dictionary relies on these definitions for use across the CAR and CASR, the proposed change will affect every occurrence of the defined terms ‘TAWS Class-A’ and ‘TAWS Class-B’ within these sets of regulations and their subordinate instruments (such as Civil Aviation Orders, Manuals of Standards, exemptions, directions, approvals, authorisations, permissions, etc).
Relevant to the flight operations regulations, the terms TAWS Class-A and TAWS Class-B, in addition to the Part 121 MOS, are also used in the Part 135 MOS, the 10-13 seat aeroplane exemption CASA EX74/24 and the Subpart 121.Z TAWS regulations.