Cases of progressive smouldering ignition undetected from the outside have been reported .Immediately after completion of the test programme , dismantle the test specimen and examine it internally for progressive smouldering ignition . If this is found , extinguish the test specimen and record a failed result and complete the test report ( see Clause 10 ) . For safety reasons , ensure that all smouldering has ceased before the rig is left unattended .If no internal progressive smouldering ignition is found , record nonignition and complete the test report ( see Clause 10 )