If the flame is very unstable during the test and if it does not expose the test hose fully during at least 75% of the test duration, or if the time to leakage in any test deviates more than 30 s from the determined mean value, another two hose samples shall be tested.
After each test the fuel lines and fuel tray shall be cooled to ambient temperature before a new test sample is mounted and water and fuel, respectively, are refilled.
WARNING - Large flames and burning waste fuel could be obtained at leakage and therefore the test shall be performed in a non-combustible environment and with personnel equipped with protective equipment and fire fighting equipment.
