The basics of the UL-94V flame test are reviewed in the FAA report . This investigation was focused on examining how the physical and chemical characteristics of the materials influenced the outcome of the Bunsen burner test and how they could be optimised to improve the prediction of fire protection of cabin components. The UL-94V test was shown to be a complex fire scenario involving two ignition attempts of 10 seconds each, unsteady burning, and upward flame spread, as well as melting and dripping. It was proposed that the rate at which heat is produced by the sample flame must be above a minimum (critical) value for the sample to ignite and continue burning. It was shown that the fire behaviour of plastic materials is largely influenced by the heat release parameter, the critical heat flux for ignition and thermal response parameters. It was shown that in UL-94V rating tests, it was difficult to correlate the heat flux for ignition and heat release rate (HRR) per unit area during burning quantitatively because of uncertainties in flame height, methane flow rate, position of the burner, incident flame heat flux for both the premixed and diffusion flames and heat flux from the flame to the bottom edges and along the faces of the specimen.