Yes, stewardesses have to go to 'school'. Most airlines typically have a months' long training camp where you have to room with other potential employees in which undesirable candidates are weeded out. For those not bright enough to remember all of the 3-letter airport abbreviations and other intellectually demanding tasks they receive the boot.
Anyway, this 'gem' I remember from cable TV days is a real diamond in the rough. The jokes are crude and lewd! What do you expect from a movie starring the one and only Judy Landers or even Don Most? This movie can provoke the same reaction as Recruits (1986) which is a sex comedy rip-off of Police Academy. I remember begging my mom to take me to see that movie thinking it was hilarious but my mom didn't agree with me for some reason. For those looking for a family friendly comedy you need to look elsewhere.