ON THE 084-0 MMU, 9A LONGWALL SECTION, AN ALLEGED IGNITION OCCURRED. AN ORANGE-RED COLORED FLAME, ROUND IN SHAPE ON THE HEADGATE END OF THE SHEAR DRUM. FLAME ENVELOPED DRUM WHICH IS 62"" HIGH AND 42"" WIDE. LASTED 3-5 SECONDS. SELF EXTINGUISHING. NO INJURIES TO PERSONS OR DAMAGE TO PROPERTY.