ADVOKS GLOBAL · KENYA
The Civil Aviation (Environmental Protection Aircraft Noise) Regulations, 2025
67. Noise certification reference procedures
Edition: 2026-03-03 · In force
67. Noise certification reference procedures
(1)The reference procedure shall be established as follows—(a)the helicopter shall be stabilized in level flight overhead the flight path reference point at a height of 150 m ± 15 m (492 ft ± 50 ft);(b)a speed of 0.9 VH or 0.9 VNE or 0.45 VH + 120 km/h (65 kt) or 0.45 VNE + 120 km/h (65 kt), whichever is the least, shall be maintained throughout the overflight procedure. For noise certification purposes, VH is defined as the airspeed in level flight obtained using the torque corresponding to minimum engine installed, maximum continuous power available for sea level pressure (1 013.25 hPa), 25°C ambient conditions at the relevant maximum certificated mass. VNE is defined as the not-to-exceed airworthiness airspeed imposed by the manufacturer and approved by the certificating authority;(c)the overflight shall be made with the rotor speed stabilized at the maximum normal operating rpm certificated for level flight;(d)the helicopter shall be in the cruise configuration; and(e)the mass of the helicopter shall be the maximum take-off mass at which noise certification is requested.(2)The value of VH and/or VNE used for noise certification shall be quoted in the approved flight manual.