Fire rated access panels work when they are installed according to the manufacturer’s data sheet details. There are over 9 different details on how a ceiling penetration should be prepared. These details are subject to the fire rating levels of the ceiling and the manufacturer. Remember, a fire rated access panel is only a product. However, when you install it to the properly prepared ceiling penetration, it becomes a passive fire system.
Plasterboard ceiling penetration was not prepared as per manufacturers test approvals

Plasterboard ceiling penetration was not prepared as per manufacturers test approvals

This photo demonstrates when a penetration is correctly prepared before installing a fire rated access panel

Aldo Pena
Cert IV – Fire Technology | AMCA Accredited in Fire damper installation and certification
Cert II – Asset Maintenance of Fire Protection Equipment