Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p112
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 112/225)
Character Range: 601267–604045

spacing between the inner lights of each pair of lights must be equal to the lateral spacing selected for the TDZ marking.

       (3) The spacing between the lights of the same pair must not be more than the greater of the following:

(a) 1.5 m;

(b) half the width of the TDZ marking (see Figure 9.71 (1)).

       (4) If provided on a runway without TDZ markings, simple TDZ lights must be installed in a position that provides the equivalent TDZ information.

       (5) Simple TDZ lights must be:

(a) fixed unidirectional lights, showing white or variable white; and

(b) aligned so as to be visible to the pilot of a landing aeroplane in the direction of approach to the runway.

       (6) For simple TDZ lights, the light intensity and distribution must be in accordance with the specifications shown in Figure 9.75 (10).

Note   As a good operating practice, CASA recommends that simple TDZ lights should be supplied with power on a separate circuit to other runway lighting so that they may be used when other lighting is switched off.

     Figure 9.71 (1)   Simple touchdown zone lights (shows matters)

9.72 Runway TDZ lights

       (1) For a runway intended for precision approach CAT II or CAT III operations, runway TDZ lights must be provided.

Note   For a precision approach CAT I lighting system, touchdown zone lights may also be provided.

       (2) Runway TDZ lights must:

(a) be a series of transverse rows of lights, or barrettes, that are symmetrically located on each side of the runway centreline; and

(b) extend for whichever of the following is the lesser:

 (i) from the runway threshold for a distance of 900 m;

 (ii) the overall length of the TDZ markings, as described in section 8.24.

       (3) For paragraph (2) (b):

(a) each barrette must consist of 3 light units, 1.5 m apart; and

(b) the innermost light of each barrette must be located 9 m from the true runway centreline; and

(c) the first pair of barrettes must be located 60 m from the threshold; and

(d) subsequent barrettes must be spaced longitudinally 60 m apart.

       (5) Runway TDZ lights must be inset, fixed, unidirectional lights, showing variable white.

       (6) For runway TDZ lights, the light intensity and distribution must be in accordance with Figure 9.75 (10).

9.73 Photometric characteristics of runway lights and calculation method

       (1) Figure 9.75 (11) shows the method that must be followed to establish the grid points for calculating the average intensity of runway lights for non-instrument and instrument non‑precision approach runways.

       (2) Figure 9.75 (12) shows the method that must be followed to establish grid points for calculating the average intensity of runway lights for precision approach runways.

       (3) The