RedactedNarrative: OPERATOR 1 WAS OPERATING VESSEL 1 WHILE CRUISING ON PLANE WITH TWO WATER SKIERS BEING PULLED BY THE VESSEL. AS VESSEL 1 WAS UNDERWAY THE ENGINE BACKFIRED CAUSING VESSEL 1 TO CATCH ON FIRE. THE OCCUPANTS WERE ABLE TO VOLUNTARILY DEPART FROM VESSEL 1 BEFORE IT BECAME FULLY ENGULFED IN FLAMES. THERE WAS NO INJURIES AND VESSEL 1 WAS A TOTAL LOSS.