What is emergency induction port?

An Emergency Induction Port (EIP), sometimes also called an Emergency Oxygen System (EOS), is a part of an aircraft's ventilation system that is used in emergency situations where the normal air supply to the cabin is compromised.

The EIP is a small opening in the cabin ceiling that allows for the introduction of oxygen or compressed air into the cabin. It is typically used when smoke or fumes are present in the cabin, such as during a fire or other emergency. The EIP is controlled by a switch in the cockpit and can be activated quickly by the pilot or flight crew.

The EIP is connected to an emergency oxygen or compressed air supply that is stored on the aircraft. The oxygen supply is typically used for breathing in the event that the cabin air becomes contaminated or oxygen levels drop due to a decompression event. Compressed air can also be used in some cases to blow smoke or fumes out of the cabin.

The use of an EIP is a critical safety feature that helps to protect passengers and crew in emergency situations. It is regulated by aviation authorities such as the Federal Aviation Administration (FAA) and must meet specific safety requirements.