Descent/Approach and Landing
The following approach procedures are aimed at avoiding a rate-of-descent/airspeed combination that leads to high Blade-Vortex Interaction (BVI) noise. The high noise region is illustrated in Figure below as a function of airspeed and rate-of-descent. The noise abatement approach procedures are also shown on the figure.
Figure. High noise region and noise abatement procedures for Bell 206-series helicopters
1. Commence the approach by following one of the two procedures:
a. First establish a rate-of-descent of at least 500 fpm.
b. Then reduce airspeed while increasing the rate of descent to at least 800 fpm.
a. First establish a rate-of-descent of no more than 200 fpm while reducing the airspeed to approximately 55 knots.
b. Then increase the rate-of-descent to at least 800 fpm.
2. At a convenient airspeed between 50 and 80 knots, setup an approach glideslope while maintaining the 800 fpm or greater rate-of-descent.
3. Increase the rate-of-descent if the main rotor tends to slap, or if a steeper glideslope is desired.
4. Reduce the airspeed to below 60 knots before decreasing the rate-of-descent and commencing the flare.
5. Execute a normal flare and landing.