I do not believe that civilian craft have inserting systems, but even then you are now relying on the inerting system to be working properly in the presence of an uncontained fire.
Modern airliners are fitted with a Nitrogen Gas Inerting System. NGS.
However, to my knowledge it may be allowed to be inop for up to 120 days as per the MEL.
I do not know if this a/c was fitted with NGS. Or if it was in operation at the time.