Originally Posted by
petewinca
Many years ago I flew CHS to RDU in a 12 seater turbo prop which had pilot and co pilot but no FA.
I'm not sure what planes types meet this but per FAR Part § 121.391
(1) 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.
(2) 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.
So
if max payload is 7,500lbs+ and 9 or less seats no FA is required
If max payload is 7,500lbs or less and 19 seats or less, no FA is required