ADVOKS GLOBAL · KENYA
The Civil Aviation (Environmental Protection Aircraft Noise) Regulations, 2025
68. Noise certification reference procedures-Test
Edition: 2026-03-03 · In force
68. Noise certification reference procedures-Test
(1)The test procedures shall be acceptable to the airworthiness and noise certificating authorities of the State issuing the certificate.(2)The test procedure and noise measurements shall be conducted and processed in an approved manner to yield the noise evaluation measure designated as sound exposure level (LAE), in A-weighted decibels integrated over the duration time, as described in the Eleventh Schedule.(3)Test conditions and procedures shall be closely similar to reference conditions and procedures or the acoustic data shall be adjusted, by the methods outlined in the Eleventh Schedule, to the reference conditions and procedures specified in this chapter.(4)During the test, flights shall be made in equal numbers with tailwind and headwind components.(5)Adjustments for differences between test and reference flight procedures shall not exceed 2.0 dB(A).(6)During the test, the average rotor rpm shall not vary from the normal maximum operating rpm by more than ±1.0 per cent during the 10 dB-down period.(7)The helicopter airspeed shall not vary from the reference airspeed appropriate to the flight demonstration as described in Appendix 4 by more than ±5.5 km/h (±3 kt) throughout the 10 dB-down period.(8)The helicopter shall fly within ±10° from the vertical above the reference track through the reference noise measurement position.(9)Tests shall be conducted at a helicopter mass not less than 90 per cent of the relevant maximum certificated mass and may be conducted at a mass not exceeding 105 per cent of the relevant maximum certificated mas.