Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p144
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 144/225)
Character Range: 684983–687674

lights must be:

(a) monitored during the daily serviceability inspection; and

(b) switched on for the purpose of monitoring.

       (3) T-VASIS, PAPI and approach lighting must be monitored in accordance with the frequencies and procedures set out in the aerodrome operator's aerodrome manual.

       (4) Grass areas around lights must be maintained to ensure that the lights:

(a) are not in any way obscured; and

(b) are free from dirt that could degrade a light's colour and conspicuity.

       (5) Damage to lights, including loss or degradation of lights, must be repaired as soon as possible.

9.137 Reporting of aerodrome lighting outage

       (1) An aerodrome lighting system or facility experiencing a lighting outage (on outage) must be fixed as soon as possible after the outage is detected.

Note   The specifications listed below are intended to define the maintenance performance level objectives. They are not intended to define whether the lighting system is operationally out of service. Nor are they meant to condone outage, but are intended to indicate when lighting outage must be notified to the NOTAM Office.

       (2) The specifications in subsections (3), (4) and (5) must be used as triggers for NOTAM action to advise pilots of actual outage, unless the outage can be rectified before the next period of the light's use.

       (3) A light is deemed to be in a failed stated (unserviceable) if:

(a) the main beam is out of its specified alignment; or

(b) the main beam average intensity is less than 50% of the specified value; or

(c) for light units with the designed main beam average intensity above the specified value — the 50% value must be correlated to the design value; or

(d) a deterioration of the light signal is detectable to the human eye.

       (4) A flashing light is deemed to be on outage if:

(a) the light ceases to flash; or

(b) the frequency or duration of flash is outside the specified range by a ratio equal to or greater than 2:1; or
(c) within a 10 minute period — more than 20% of flashes fail to occur.

Note   Flashing lights also include LAHSO lights, which have a slow flash rate.

       (5) A lighting system is deemed to be on outage if:

(a) for a lighting system comprising less than 4 lights (for example, intermediate holding position lights or runway threshold identification lights) — any of the lights is unserviceable; and
(b) for a lighting system comprising 4 or 5 lights (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,