Document ID: chunk:federal_register_of_legislation:F2024C01173:reg:7:p6
Version: federal_register_of_legislation:F2024C01173
Segment Type: reg
Provision Reference: reg 7 (pt 6/11)
Character Range: 238615–241359

preselected altitude.
 (3) An aeroplane that is not required to be fitted with altitude alerting equipment under subsection (1) must be fitted with altitude alerting equipment at least in the form of an assigned altitude indicator.

11.20  Aeroplane flown with inoperative altitude alerting equipment or assigned altitude indicator
  Despite section 11.19, altitude alerting equipment may be inoperative at the beginning of a flight only if:
 (a) the flight:
 (i) begins within 72 hours of the time the equipment was found to be inoperative; and
 (ii) is from an aerodrome at which there is no facility for the equipment to be repaired or replaced; and
 (b) for an aeroplane that is required to be fitted with an ACAS—the ACAS is not also inoperative.
Note: For a flight of an aeroplane fitted with inoperative altitude alerting equipment, section 11.07 of the Part 91 Manual of Standards states requirements in relation to air traffic control clearances.

11.21  Airborne collision avoidance system (ACAS)
 (1) In this instrument:
approved ACAS means an ACAS that is authorised in writing by CASA or the national aviation authority of a recognised country in accordance with one of the following:
 (a) (E)TSO-C119c;
 (b) (E)TSO-C219.
resolution advisory, or RA, for an ACAS, means an indication given to the flight crew recommending:
 (a) a manoeuvre intended to provide separation from all threats; or
 (b) a manoeuvre restriction intended to maintain existing separation.
traffic advisory, or TA, for an ACAS, means an indication given to the flight crew that a certain intruder aircraft is a potential threat.
 (2) An aeroplane mentioned in subsection (3) must be fitted with an approved ACAS.
 (3) For subsection (2), the aeroplane must be a turbine-engine aeroplane that:
 (a) either:
 (i) has a maximum take-off weight of more than 15 000 kg; or
 (ii) has a maximum certificated passenger seating capacity of more than 30; or
 (b) is first registered, in Australia or elsewhere, on or after 1 January 2014, and:
 (i) has a maximum take-off weight of more than 5 700 kg but not more than 15 000 kg; or
 (ii) has a maximum certificated passenger seating capacity of more than 19 but not more than 30.

11.22  ACAS—requirements for use
 (1) During the period mentioned in subsection (2), an approved ACAS fitted to an aeroplane under section 11.21, or a TCAS fitted to an aeroplane as mentioned in section 11.21A, must be activated in a mode that enables a resolution advisory to be produced.
 (2) For subsection (1), the period begins when the aeroplane commences the take-off for the flight and ends when the aeroplane lands for the flight.
 (3) Despite subsection (1), if the aeroplane's flight manual requires the ACAS to be operated in