Project CS 13/01 - Clarification of certification requirements for instruments and equipment used in Australian aircraft
It has been long-standing CASA policy that if a navigation instrument or item of equipment is required by regulation to be fitted to or carried in Australian aircraft then that instrument or equipment must be approved by CASA. This means that the instruments or equipment listed in CAO 20.18 must be approved by one of the processes specified in Civil Aviation Safety Regulation 1998 (CASR) 21.305.
Approval is normally gained by means of a PMA/APMA or a TSO/ATSO. Other forms of approval include STC or approval as part of an aircraft type approval process. In each case, the manufacturer is required to demonstrate that the instrument or equipment meets the performance and accuracy standards that have been determined by a NAA, and will continue to do so under all expected operational conditions while being maintained in accordance with approved data.
The regulation under which this policy has been applied since 1988 is Subregulation 207(2) of CAR 1988.
The absence of a clear statement to the effect that subregulation 207(2) of CAR means that all mandatory flight and navigation instruments and equipment must be approved by CASA , has resulted in a number of amateur-built experimental aircraft being issued with approvals to fly under IFR using non-approved instruments.
The most significant concern facing CASA is that IFR operations are carried out by private, aerial work and air transport aircraft. All IFR aircraft potentially share the same airspace, use the same ground or space based navigation aids and rely on the accuracy of their flight and navigation equipment to ensure that proper separation is maintained from other aircraft and from terrain.
If some of the aircraft operating in this environment use equipment that has not been manufactured and certified in accordance with known and approved standards, then traffic separation standards could be compromised.
The proposed CASR Part 91 published in March 2011 provided:
91.745 Equipment installation and approval
(1) Subject to subregulation (2), the operator of an aircraft commits an offence if:
(a) the operator permits a flight of the aircraft to be conducted; and
(b) an instrument or item of equipment fitted or carried on the aircraft on the flight in accordance with a provision of this Subpart, is not approved.
No comments were received in regard to the approval requirement.
Pending implementation of Part 91, it is necessary to clarify and regularise the policy in current law. This could be achieved by either:
- Amending CAO 20.18; or
- Issuing an Instrument containing a general direction to comply with approval requirements for instruments and equipment.
To clarify CASA policy by an amendment to CAO 20.18 or issuing a General Direction (to be confirmed as work progresses).
This project was approved by Jonathan Aleck, Associate Director of Aviation Safety and Peter Boyd, Executive Manager Standards Division on 17 January 2013.
Standards Consultative Committee (SCC)
|Consultation updates in 2013|
|Project CS 13/01 - Clarification of certification requirements for instruments and equipment used in Australian aircraft||Project approved.||23 Jan 2013|