Não há leis federais que proíbam a ofensiva do rotor de pouso fora do campo.
14 CFR 91,119
(1) A helicopter may be operated at less than the minimums prescribed in paragraph (b) or (c) of this section, provided each person operating the helicopter complies with any routes or altitudes specifically prescribed for helicopters by the FAA;
Parte B e C, para referência
Except when necessary for takeoff or landing, no person may operate an aircraft below the following altitudes:
(b) Over congested areas. Over any congested area of a city, town, or settlement, or over any open air assembly of persons, an altitude of 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet of the aircraft.
(c) Over other than congested areas. An altitude of 500 feet above the surface, except over open water or sparsely populated areas. In those cases, the aircraft may not be operated closer than 500 feet to any person, vessel, vehicle, or structure.
No entanto, leis estaduais, leis locais, leis de zoneamento, etc. mudam de local para local. Você precisa se certificar de planejar o local de destino e verificar essas leis.
Por exemplo, no estado de Nova Jersey, os helicópteros só podem ser desembarcados nos seguintes locais:
- Heliporto de uso público permanente ou vertiport
- Uso especial permanente ou uso restrito helistop ou vertiport
- Helistop temporário ou vertiport
( Referência )