CSP-520N-1
Normal Procedures
MD 520N (500N) ROTORCRAFT FLIGHT MANUAL
R
Revision 1
4-29/(4-30 blank)
FAA Approved
4-18. NOISE IMPACT REDUCTION PROCEDURES
Safe operation of the helicopter always has the highest priority.
Utilize the following procedures only when they will not conflict
with safe helicopter operation.
Certain flight procedures are recommended to minimize noise impact on sur−
rounding areas. It is imperative that every pilot subject the public to the least
possible noise while flying the helicopter.
Takeoff:
Takeoff using maximum takeoff power at the speed for best rate of climb
(Ref. Section V).
Proceed away from noise sensitive areas.
If takeoff must be made over noise sensitive area, distance (altitude) is best
form of noise suppression.
Cruise:
Maintain 1000 feet minimum altitude where possible.
Maintain speed of no more than 110 knots over populated areas.
Keep noise sensitive areas to left side of helicopter.
Coordinated turns at around the speed for best rate of climb cause no ap−
preciable change in noise.
Sharper turns reduce area exposed to noise.
Approach:
Use steepest glideslope consistent with passenger comfort and safety.
Keep noise sensitive areas to left side of helicopter.
CAUTION
