14 CFR Parte § 121.391.
Depende do tamanho / peso do avião e quantos passageiros ele pode suportar
Except as specified in § 121.393 and § 121.394, each certificate holder must provide at least the following flight attendants on board each passenger-carrying airplane when passengers are on board:
- For airplanes having a maximum payload capacity of more than 7,500 pounds and having a seating capacity of more than 9 but less than 51 passengers—one flight attendant.
- For airplanes having a maximum payload capacity of 7,500 pounds or less and having a seating capacity of more than 19 but less than 51 passengers—one flight attendant.
- For airplanes having a seating capacity of more than 50 but less than 101 passengers—two flight attendants.
- For airplanes having a seating capacity of more than 100 passengers—two flight attendants plus one additional flight attendant for each unit (or part of a unit) of 50 passenger seats above a seating capacity of 100 passengers.
As partes 121.393.394 relaxam esses requisitos quando um avião para, mas denota quão próximos os assistentes de vôo devem estar, e outras coisas como requisitos de portas de saída.
Lembre-se, os comissários de bordo estão lá para sua segurança :), que é a motivação para esses regulamentos.
[Editar] 14 CFR Part 91.533 abrange voos operados sob os regulamentos "Parte 91":
§ 91.533 Requisitos de comissários de bordo.
No person may operate an airplane unless at least the following number of flight attendants are on board the airplane:
For airplanes having more than 19 but less than 51 passengers on board, one flight attendant.
For airplanes having more than 50 but less than 101 passengers on board, two flight attendants.
For airplanes having more than 100 passengers on board, two flight attendants plus one additional flight attendant for each unit (or part of a unit) of 50 passengers above 100.
No person may serve as a flight attendant on an airplane when required by paragraph (a) of this section unless that person has demonstrated to the pilot in command familiarity with the necessary functions to be performed in an emergency or a situation requiring emergency evacuation and is capable of using the emergency equipment installed on that airplane.
Parece que o "treinamento" para atuar como parte da Aeromoça Parte 91 é apenas mostrar ao piloto que eles são capazes.
A grande diferença entre a Parte 121 e a Parte 91 é número de lugares (capacidade potencial) vs. pessoas realmente a bordo . Isso é interessante à luz das recentes entregas do 787 Boeing Business Jet ( link ). Então, se fosse apenas o proprietário e a tripulação do piloto, não precisaria ser um comissário de bordo (supondo, é claro, que eles estejam operando sob a Parte 91), mesmo que seja um avião enorme.