Powerplant Fuel Systems ACES offers Powerplant Fuel Systems Testing to determine the fire resistance of high-temperature hose assemblies used in fire zones to show compliance with the requirements of Technical Standard Orders (TSO) C42, C53A, and C75. Powerplant Firewalls Cargo Liner (Flame Penetration) Magnesium Alloys Acoustic Insulation Burnthrough Request Testing Request Information