In which locations can emergency oxygen system masks be found on an aircraft?

Emergency oxygen system masks are strategically placed in specific areas throughout the aircraft to ensure passengers and crew have quick access in case of an in-flight emergency. These masks are typically found in passenger service units, which are located above the seats within the cabin. They are also stored in ceiling compartments that are accessible when needed, as well as in crew rest compartments for the flight crew to use if necessary during the flight.

The placement of oxygen masks in these locations provides effective coverage for all passengers and crew while ensuring that the masks are easily reachable in an emergency situation. This systematic distribution is vital for passenger safety, particularly in cases of cabin depressurization, where access to supplemental oxygen is crucial.