What is the maximum number of seats allowed for a commuter category aircraft excluding the pilot seat?

The maximum number of seats allowed for a commuter category aircraft, excluding the pilot seat, is established by regulatory frameworks governing aviation, such as those set by the Federal Aviation Administration (FAA) in the United States. This category of aircraft is defined by its seating capacity which is critical for designating operational standards, safety, and regulatory compliance.

Commuter category aircraft are specifically designed to accommodate a maximum of 19 passenger seats, which allows for a certain level of operational flexibility for regional air service. It is important to note that while the maximum seating capacity is 19, this includes only passenger seats and does not account for cockpit seating. Thus, it is accurate to state that the maximum number of seats permitted for passengers is indeed 19.

This distinction is significant because it determines the aircraft's classification and the applicable regulations; exceeding this number could classify the aircraft under different operational rules, which could increase safety requirements, operational costs, and regulatory complexity.