Part 121 of CASR Australian air transport operations - larger aeroplanes

Rule status


New rules for operators conducting air transport in larger aeroplanes commenced on 2 December 2021.

Part 121 of the Civil Aviation Safety Regulations (CASR) covers the air transport rules for larger aeroplanes.

The term air transport replaces both charter and regular public transport (RPT) and adds medical transport operations such as patient transport.

You will also need to comply with Part 119 which deals with the general certification and management for air transport operations.

If you conduct other operations, such as rotorcraft air transport, you need to comply with other CASR flight operations rules (Parts).

Transition to new regulations

We have compiled information and resources about transitioning to the new regulations. Visit our flight operations transition section to find out more.

Who it affects

Part 121 generally applies to air transport operations in aeroplanes with a seating capacity of more than 9 seats, or a maximum take-off weight (MTOW) of more than 8,618 kg. 

Subpart 121.Z applies to air transport operations in single-engine aeroplanes with a seating capacity of more than 9 seats and a MTOW of 8,618 kg or less. 

All operators and pilots also need to comply with Part 91 – General operating and flight rules, noting that Part 121 may add to or turn off some Part 91 requirements – either completely or partially.

Non-legislative instruments

Non-legislative instruments include exemptions to particular regulatory requirements in aviation regulations or a Manual of Standards, but which apply to a particular person. Non-legislative instruments related to this part will display in this space or your can view our list of non-legislative instruments.

Guidance material

Advisory material provides advice and guidance to explain particular regulatory requirements of a CASR Part. Guidance material relating to this part will appear in this space or you can view all our guidance material.

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