A total of 23 fire tests were conducted in a 2357-cubic foot simulated class C cargo compartment. Various lining materials, fire sources, loading configurations, and smoke detectors were used to determine the ability of class C cargo compartments to control fires. The simulated class C cargo compartment did not successfully control the test fires in all cases. The major conclusion of this study is that the 45 bunsen burner test specified in FAR 25.855 does not assure that cargo liners will not burn through when subject to realistic fires.