Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p134
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 134/225)
Character Range: 658114–661775

the apron. This ensures the illuminance of markings associated with apron taxiways and taxilanes will be provided until the aircraft reaches the parking position.

The uniformity ratio between the average of all values of illuminance is measured over a grid covering the relevant area. This measurement is not intended only to confirm that the minimum illuminance within the parking position area has been achieved. Illuminance must also be within the 4:1 ratio mentioned in subsection 9.116 (3). For example, a 4:1 ratio does not necessarily mean a minimum of 5 lux. If an average illuminance of, for example, 24 lux is achieved, then the minimum should not be less than 24/4 = 6 lux.

     Table 9.116 (3)   Minimum parking position illuminance

Aerodrome reference code letter for parking position  Minimum parking position average illuminance for aprons intended for air transport operations  Minimum parking position average illuminance for aprons not intended for air transport operations
A                                                     10 lux                                                                                         5 lux
B                                                     10 lux                                                                                         5 lux
C                                                     20 lux                                                                                         10 lux
D                                                     20 lux                                                                                         10 lux
E                                                     20 lux                                                                                         10 lux
F                                                     20 lux                                                                                         10 lux

Note   The ground service equipment area independent of the aprons is recommended to have a horizontal illuminance of at least 10 lux with a uniformity ratio (average to minimum) of not more than 4:1.

       (7) A dimming control:

(a) may be provided for apron floodlighting to allow reduction in the illuminance of an aircraft parking position that is not in use; and

(b) must:

 (i) ensure that the minimum floodlighting intensity for the parking position does not reduce to less than 50% of its normal value; and

 (ii) return the parking position to the minimum average illuminance when the apron becomes active.

       (8) If apron floodlighting is activated by a PAL, the apron floodlighting must achieve normal illumination within 2 minutes of activation.

       (9) For aprons used by air transport operations, the apron floodlighting must be:

(a) included in the aerodrome secondary power supply, if available; and

(b) capable of achieving not less than 50% of normal illuminance within 60 seconds of the end of a power interruption of 30 seconds or less.

       (10) If floodlights cannot meet the requirement of subsection (9), auxiliary floodlighting must be provided that can provide at least 2 lux of horizontal illuminance of aircraft parking positions. This auxiliary floodlighting must remain on until the main lighting has achieved 80% of normal illuminance.

Note   Each floodlight design should meet a target value which allows lighting to still meet illuminance requirements in the event of commonly occurring outages. The floodlight designer may choose the factor, provided it is appropriate for the particular floodlighting system.

CHAPTER 9

Division 13 Aircraft parking position lighting

9.117