Document ID: chunk:federal_register_of_legislation:F2024C00333:reg:9:p7
Version: federal_register_of_legislation:F2024C00333
Segment Type: reg
Provision Reference: reg 9 (pt 7/13)
Character Range: 120858–123655

the altitude alerting equipment must:
 (a) include an assigned altitude indicator; and
 (b) alert the flight crew if the aeroplane approaches a preselected altitude; and
 (c) alert the flight crew, including by an aural warning, if the aeroplane deviates from a preselected altitude.
 (3) An aeroplane that is not required to be fitted with altitude alerting equipment under subsection (1), that is operating under the IFR in controlled airspace, must be fitted with altitude alerting equipment at least in the form of an assigned altitude indicator.
 (4) This section applies subject to section 11.21.

11.21  Aeroplane flown with inoperative altitude alerting equipment or assigned altitude indicator
  Altitude alerting equipment (the equipment) or an assigned altitude indicator (the indicator), fitted to an aeroplane under section 11.20, may be inoperative at the beginning of a flight of the aeroplane, but only if:
 (a) the flight:
 (i) begins within 72 hours of the time the equipment, or indicator, was found to be inoperative; and
 (ii) is from an aerodrome at which there is no facility for the equipment, or indicator, 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.

11.22  Airborne collision avoidance system—ACAS
 (1) An aeroplane mentioned in subsection (2) must be fitted with an approved ACAS.
 (2) For subsection (1), the aeroplane must be a turbine-engine aeroplane that:
 (a) has an MTOW of more than 5 700 kg; and
 (b) was first registered, in Australia or elsewhere, on, or after, 1 January 2014.

11.23  ACAS—requirements for use
 (1) During the period mentioned in subsection (2), an approved ACAS fitted to an aeroplane under section 11.22 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 another mode in specified circumstances, the ACAS may be operated in that mode in those circumstances.
Note: For example, the RA indication mode (using traffic advisory (TA) indication only or equivalent) may be inhibited if this is called for by an abnormal procedure specified in the aeroplane's flight manual.

11.24  Flight with inoperative ACAS
  An approved ACAS fitted to an aeroplane under section 11.22 may be inoperative at the beginning of a flight of the aeroplane only if:
 (a) either:
 (i) the flight