Document ID: chunk:federal_register_of_legislation:F2024C01173:reg:7:p7
Version: federal_register_of_legislation:F2024C01173
Segment Type: reg
Provision Reference: reg 7 (pt 7/11)
Character Range: 241117–243821

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.

11.23  Flight with inoperative ACAS or TCAS
 (1) An approved ACAS, or a TCAS mentioned in section 11.21A, may be inoperative at the beginning of a flight only if:
 (a) the flight:
 (i) begins from an aerodrome at which there is no facility for the ACAS or TCAS to be replaced, within 72 hours of the time the ACAS or TCAS was found to be inoperative; or
 (ii) is to an aerodrome at which there is a facility for the ACAS or TCAS to be repaired or replaced; and
 (b) if the aeroplane is required to be fitted with an altitude alerting system—that system is not also inoperative.

11.24  Terrain awareness and warning system (TAWS)
 (1) In this section:
TAWS-Class A means a terrain awareness and warning system that:
 (a) meets the performance requirements for Class A equipment in (E)TSO‑C151b; and
 (b) is authorised in writing by CASA or the national aviation authority of a recognised country.
TAWS-Class B means a terrain awareness and warning system that:
 (a) meets the performance requirements for Class B equipment in (E)TSO‑C151b; and
 (b) is authorised in writing by CASA or the national aviation authority of a recognised country.
 (2) A turbine-engine aeroplane must be fitted with a TAWS-Class A.
 (3) A piston-engine aeroplane must be fitted with a TAWS-Class A or a TAWS‑Class B.

11.25  Flight with inoperative TAWS equipment
A TAWS fitted in accordance with section 11.24 may be inoperative at the beginning of a flight but only if the flight begins:
 (a) from an aerodrome at which there is no facility for the TAWS to be repaired or replaced; and
 (b) within 24 hours of the time the TAWS was found to be inoperative.

11.26  Airborne weather radar equipment
 (1) An aeroplane must be fitted with airborne weather radar equipment.

11.27  Flight with inoperative airborne weather radar equipment
 (1) Despite section 11.26, airborne weather radar equipment may be inoperative at the beginning of a flight only if none of the relevant forecasts or reports indicate that potentially hazardous weather conditions exist:
 (a) in the flight path along which the aeroplane will be flown; or
 (b) if the operational flight plan for the