Originally Posted by
john_tullamarine
(a) 20.16.3.12.2(b) specifies 2-6 passenger seats in the first entry of the table. 20.16.3.2 (definitions) specifies that a passenger is a person who is not a crew member, ergo passenger seats exclude crew seats and, a 2-seat aircraft presents a problem
If this argument is correct, it indeed presents a problem.
If the number of passenger seats excludes crew seats, the number of passenger seats in a 152 is zero, the number of passenger seats in a 172 is 2 etc.
20.16.3.12.2 says the number of passengers can only exceed the number of passenger seats if the excess passengers are infants or children. So a C152 is not allowed to carry a passenger, and a C172 could only carry 2 passengers, not 3, unless the third was a child.