Does the CRJ 700 aircraft have an APU Serv Bus button on the FA panel?

In the context of the CRJ 700 aircraft, the absence of an APU Serv Bus button on the Flight Attendant (FA) panel is a significant aspect of its design. The APU, or Auxiliary Power Unit, provides electrical power and pneumatic power for starting the engines and for cabin pressurization on the ground when the aircraft is not connected to external power.

The FA panel, which is primarily used for cabin crew operations, typically does not include controls or indicators directly related to the APU’s functionalities. Instead, the APU controls are located in the cockpit, where the flight crew can manage power settings and monitor performance. The design choice to exclude an APU Serv Bus button from the FA panel is likely based on the intention to limit the flight attendants' responsibilities concerning operational systems that are predominantly the purview of the flight crew.

This design ensures that the cabin crew can focus on passenger safety and service, rather than engaging with systems that they are not generally required to operate under normal circumstances. Understanding this aspect of the CRJ 700's design helps clarify operational roles and the specific functionalities available at different crew stations within the aircraft.