Powerplant Firewalls The Oil Burner Test for powerplant firewalls is used to evaluate the ability to resist the flame propagation/penetration and to show compliance with the requirements of 14 CFR §§ 25.867, 25.865, 25.1191, and 25.1193 Magnesium Alloys Cargo Liner (Flame Penetration) Powerplant Fuel Systems Acoustic Insulation Burnthrough Request Testing Request Information