Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p145
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 145/225)
Character Range: 687445–690130

(for example wind direction indicator lights or runway guard lights) — 2 or more lights are unserviceable; and
(c) for a lighting system comprising 6 to 13 lights (for example threshold lights or LAHSO lights) — 3 or more lights, or 2 or more adjacent lights, are unserviceable; and
(d) for a precision approach CAT II or CAT III runway:
 (i) more than 5% of the lights are unserviceable in any of the following elements:
             (A) the inner 450 m of the approach lighting system;
             (B) the runway centreline lights;
             (C) the runway threshold lights;
             (D) the runway edge lights; or
 (ii) more than 10% of the lights are unserviceable in the touchdown zone lights; or
 (iii) more than 15% of the lights are unserviceable in the approach lighting system beyond 450 m; or
 (iv) in any case other than a barrette or a crossbar — 2 or more adjacent lights are unserviceable; or
 (v) for a barrette or a crossbar — 3 or more adjacent lights are unserviceable; and
(e) in the case of a runway meant for take-off in visibility or RVR conditions less than 550 m:

 (i) more than 5% of the lights are unserviceable in any of the following elements:

             (A) centreline lights (if provided);
             (B) runway edge lights; or
   (ii) 2 or more adjacent lights are unserviceable; and
(f) in the case of a taxiway intended for use in visibility or RVR conditions less than 350 m, 2 or more adjacent taxiway centreline lights are unserviceable; and
(g) in the case of any other lighting system with more than 13 lights:
 (i) more than 15% of the lights are unserviceable; or
 (ii) 2 or more adjacent lights are unserviceable.

       (6) In the calculation of a percentage of lights specified in a provision of subsection (5), any fractional number must be rounded up.

Note   For subsection (5), a lighting system means lights used to illuminate a particular aerodrome facility, for example:
(a) all of the lights used to mark a threshold; or
(b) all of the lights used to mark a runway end; or
(c) all of the runway edge lights on a runway; or
(d) all of the taxiway centreline lights on a length of taxiway between intersections.

9.138 Standards for apron lighting unserviceability

       (1) An aircraft parking position lighting system is deemed to be unserviceable if:

(a) the average horizontal illuminance falls below 50% of the associated minimum lux rating in accordance with that shown in Table 9.116 (3); or

(b) the average horizontal illuminance exceeds the maximum uniformity ratio (average to minimum) of not more than 8:1; or

(c) the average vertical illuminance falls below 50% of the associated minimum lux rating in