CS 22 1322 Warning, caution and advisory lights

CAA ORS9 Decision No. 1

If warning, caution, or advisory lights are installed in the cockpit, they must, unless otherwise approved by the Agency, be: 

(a) Red, for warning lights (lights indicating a hazard which may require immediate corrective action); 

(b) Amber, for caution lights (lights indicating the possible need for future corrective action); 

(c) Green, for safe operation lights; and 

(d) any other colour, including white, for lights not described in sub-paragraphs (a) to (c) of this paragraph, provided the colour differs sufficiently from the colours prescribed in subparagraphs (a) to (c) of this paragraph to avoid possible confusion.

(e) Effective under all probable cockpit lighting conditions.