Which mid-cabin door exit does not have a pressure indicator?

The mid-cabin door exit that does not have a pressure indicator is the 2L door. In many aircraft configurations, the 2L door is designed differently compared to the other mid-cabin exits. Typically, pressure indicators are installed on doors that are subject to different conditions and regulations regarding emergency exit procedures, whereas the 2L door may have been engineered with alternative safety measures or operational procedures that do not require a pressure indicator.

The other exits, such as 1R, 1L, and 2R, are designed with pressure indicators as part of their safety features to inform crew about the cabin pressure status when determining whether it is safe to open the door in case of an emergency. The absence of a pressure indicator on the 2L exit indicates a unique structural or functional design consideration that has been made for that specific exit in the aircraft. This knowledge is crucial for flight crew members to ensure they are aware of the proper use and functions of all exit doors during emergencies or evacuations.