Document ID: chunk:federal_register_of_legislation:F2024C01118:reg:5:p1
Version: federal_register_of_legislation:F2024C01118
Segment Type: reg
Provision Reference: reg 5 (pt 1/2)
Character Range: 64581–67453

5     Less than 963 hPa                           FL130

Note   The intention is to retain a minimum buffer of 1 000 ft above the transition altitude.
       (4) The pilot in command must not cruise or drift within the transition layer.
       (5) For an operation at or below the transition altitude, the pilot in command must use the following altimeter setting:
(a) the current local QNH (either an accurate QNH as defined in section 14.04 or a forecast QNH) of a station along the route within 100 NM of the aircraft;
(b) if the current local QNH is not known — the current area forecast QNH.
       (6) For an operation above the transition altitude, the pilot in command must use an altimeter setting of 1 013.2 hPa.
       (7) On climb, the pilot in command must change between QNH and 1 013.2 hPa after passing 10 000 ft and before levelling off.
       (8) On descent, the pilot in command must change between 1 013.2 hPa and the QNH before entering the transition layer.

15.03 Australian domestic airspace — inoperative radio requirements
       (1) This section applies to a flight of a Part 131 aircraft within any class of airspace, whether controlled or uncontrolled, that is within an Australian FIR and is not specified in the AIP as an oceanic control area.
Note   At the commencement of this instrument, the AIP document specifying the geographic boundaries of oceanic control areas is the Designated Airspace Handbook.
       (2) If the radiocommunication system becomes inoperative during an operation in any Australian domestic airspace, the pilot in command must do the following:
(a) if operating in Class E or G airspace:
           (i) select code 7600 on the aircraft transponder (if fitted); and
           (ii) remain outside controlled airspace; and
           (iii) assume the radiocommunication system is functioning and broadcast position and intentions on the frequency appropriate to the area of operation; and
           (iv) as soon as practicable, descend below 5 000 ft to continue flight under the VFR;
(b) if operating in Class A, B, C or D airspace or in a restricted area:
           (i) select code 7600 on the aircraft transponder (if fitted); and
           (ii) assume the radiocommunication system is functioning and broadcast position and intentions on the frequency prescribed in the authorised aeronautical information; and
           (iii) attempt to contact ATS by telephone; and
           (iv) commence descent in preparation for landing; and
           (v) land as soon as practicable.
Note   See subsection 26.23 (7) for requirements relating to Mode A transponder emergency codes.

15.04 Mandatory broadcast area requirements
       (1) This section applies to the pilot in command of a flight in an MBA mentioned in subsection (2).
       (2) A volume of Class G airspace within the Australian FIR is an MBA if it