EASA 2022-0231

Requires replacement of the aluminum central firewall stiffener with a stiffener made of titanium. Prompted by an investigation related to an engine compartment fire where the upper stiffener of the central firewall in the engine compartment was found damaged. It was determined that the aluminum stiffener may not withstand the high temperatures in case of a fire and consequently may not ensure the proper sealing of the engine compartment.