ADVOKS GLOBAL · KENYA
The Civil Aviation (Environmental Protection Aircraft Noise) Regulations, 2025
76. Overflight reference procedure
Edition: 2026-03-03 · In force
76. Overflight reference procedure
(1)The overflight reference procedure shall be established as follows—(a)the tilt-rotor shall be stabilized in level flight overhead the flight path reference point at a height of 150 m (492 ft);(b)a constant configuration selected by the applicant shall be maintained throughout the overflight reference procedures;(c)the mass of the tilt-rotor shall be the maximum take-off mass at which noise certification is requested;(d)in the VTOL/conversion mode, the nacelle angle at the authorized fixed operation point that is closest to the lowest nacelle angle certificated for zero airspeed, a speed of 0.9 VCON and a rotor speed stabilized at the maximum normal operating rpm certificated for level flight shall be maintained throughout the overflight reference procedure;(e)in the aeroplane mode, the nacelles shall be maintained on the down-stop throughout the overflight reference procedure, with—(i)rotor speed stabilized at the rpm associated with the VTOL/conversion mode and a speed of 0.9 VCON; and(ii)rotor speed stabilized at the normal cruise rpm associated with the aeroplane mode and at the corresponding 0.9 VMCP or 0.9 VMO, whichever is lesser, certificated for level flight.(2)The values of VCON and VMCP or VMO used for noise certification shall be quoted in the approved flight manual.