THE 5TH WHEEL WAS 2 1/2 MONTHS OLD. AFTER RETURNING FROM A 250 MILE TRIP WE ATTEMPTED TO OPEN THE BEDROOM SLIDE AND IT WOULDN'T OPEN. I PLUGGED IN THE ELECTRICAL PLUG AND OPENED THE SLIDE IN ORDER TO UNLOAD THE REMAINING CLOTHES, THEN I CLOSED THE SLIDE. THIS WAS AT APPROXIMATELY 8:00PM. AT 10:45PM MY GIRLFRIEND HEARD THREE LOUD EXPLOSIONS AND WE RAN OUTSIDE TO FIND THE 5TH WHEEL TOTALLY ENGULFED IN FLAMES. I BELIEVE NOW THE EXPLOSIONS WERE THE TIRES ON THE 5TH WHEEL. THE FRAMES (BOTH OF THEM) THAT RUN THE LENGTH OF THE 5TH WHEEL WERE BENT APPROXIMATELY 18" TOWARD THE PASSENGER SIDE OF THE TRAILER. IN ADDITION BOTH AXLES ARE BEND DOWNWARD. I DON'T IF THIS A RESULT OF THE HEAT OR NOT.