6.17.26 – Installed Physical Secondary Barriers and Inadvertent Slide Deployments

Installed Physical Secondary Barriers (IPSBs) and Inadvertent Slide Deployments (ISDs): What to Know

Wednesday, June 17, 2026

The company previously communicated important information regarding the activation of Installed Physical Secondary Barriers (IPSBs) and the prevention of Inadvertent Slide Deployments (ISDs). Below is a summary of key information that Flight Attendants should be aware of.

Installed Physical Secondary Barriers (IPSBs)

Beginning June 18, aircraft equipped with IPSBs will gradually enter service with the barriers activated and available for use. As Tech Ops removes the “Do Not Use” placards and zip ties, Flight Attendants must begin utilizing the IPSB in accordance with procedures outlined in the Inflight Manual (IFM).

IPSBs provide an additional layer of flight deck security. As aircraft enter service with activated IPSBs, Flight Attendants should familiarize themselves with the applicable procedures, follow the guidance in the Inflight Manual (IFM), and utilize Crew Resource Management (CRM) to ensure effective communication with the flight deck during IPSB use.

Inadvertent Slide Deployments (ISDs)

The company also recently highlighted the importance of preventing ISDs. Door arming and disarming remain one of the most safety-critical responsibilities Flight Attendants perform, and even a brief distraction during this process can result in injuries, equipment damage, and operational disruptions.

Many ISDs are linked to human factors and can often be prevented through strict adherence to procedures, effective communication, and maintaining situational awareness. Key reminders include minimizing distractions during door operations, conducting required crosschecks, utilizing Monitor and Challenge procedures, physically verifying door status, and restarting the process if interrupted.

Door operations should never be treated as routine!

Taking a deliberate, methodical approach each time helps protect your fellow crew members, gate agents, ground personnel, and our passengers.

As always, APFA encourages you to remain familiar with current IFM procedures and to continue exercising your vigilance, communication, and teamwork that make Flight Attendants an essential part of aviation safety.

Thank you for your continued dedication to safety. If you have any questions, please reach out to [email protected].

In Solidarity,

Andrew Rhinehart
APFA National Safety & Security Chair
[email protected]