MOC VTOL.2530 External and Cockpit Lighting

1.      Instrument lights

CS 23.1381 Amdt. 4 is accepted as means of compliance with VTOL.2530 (a) for the instrument lights.

2.      Taxi and landing lights

Depending on the aircraft configuration, either CS 23.1381 Amdt. 4 or CS 27.1383 Amdt. 6 is accepted as means of compliance with VTOL.2530 (a) and VTOL.2530 (d) for taxi and landing lights. The applicability of CS 23.1381 or CS 27.1383 as means of compliance should be agreed with the Agency based on the configuration of the aircraft in order to ensure that the objective of VTOL.2530 is fully met.

3.      Position light

Depending on the aircraft configuration, either paragraphs from CS 23.1385 to CS 23.1397 Amdt. 4, both inclusive, or paragraphs from CS 27.1385 to CS 27.1397 Amdt. 6, both inclusive, are accepted as means of compliance with VTOL.2530 (a), (b) and (c) for the position lights. The applicability the aforementioned CS-23 or CS-27 requirements as means of compliance should be agreed with the Agency based on the configuration of the aircraft in order to ensure that the objective of VTOL.2530 is fully met.

4.      Riding lights

CS 27.1399 Amdt. 6 is accepted as means of compliance with VTOL.2530 (a) and VTOL.2530 (e) for riding lights.

5.      Anti-collision lights

(a)      The anti-collision lights are intended to attract attention to the aircraft and they should be designed and installed to ensure minimum performances in terms of intensities, flash rate, colours and fields of coverage, in order to be capable to provide sufficient visibility in a timely manner for another aircraft to avoid a collision. CS 23.1401 Amdt. 4 is accepted as means of compliance with VTOL.2530 (b) and meets this intent.

(b)     In order to show compliance with VTOL.2530 (a), any potential adverse effects of the lights operations on the satisfactory performance of the flight crew duties should be assessed, for instance cockpit reflections or any possible effects of rotor or propeller blade strobing.

(c)      Other means than (a) may be proposed and agreed with the Agency to comply with VTOL.2530(a) and (b). They may be based either on the outcome of the assessment in (b) or on a different rationale. For instance, they could also have the purpose to comply with operational or local regulations in the intended operational environment by preventing harmful dazzle to outside observers, reducing light pollution, etc. The following examples provide methods that can be acceptable upon agreement with the Agency:

(1)     Installation of red anti-collision lights compliant with CS 27.1401 Amdt. 6. The applicant has to justify that the performances of the lights (intensities, flash rate, colour and fields of coverage) are sufficient to satisfy the intent of VTOL.2530 (b) for the specific VTOL capable aircraft design and operations;

(2)     Installation of anti-collision lights compliant with CS 23.1401 Amdt 4 with additional provisions aimed to adapt and make compatible the intensity of the lights with certain operational conditions or environments, e.g. by providing means for the flight crew to reduce the intensity of the lights and switch them off;

(3)     Installation of an anti-collision lighting system comprising a combination of lights compliant with (1) and lights compliant with (2).