Abstract
The report explains the overturn of a tractor-semitrailer (cargo tank) in Carmichael, California, on February 13, 1991, and the subsequent fire that resulted from the release and ignition of automotive gasoline that was being transported in the cargo tank for an intrastate delivery. The National Transportation Safety Board determines that the probable cause of the accident was the inattention of the driver, for undetermined reasons, which resulted in his operation of the tank truck at excessive speeds leading to its overturn. Contributing to the severity of the accident was the failure of one of the liquid-level sensors mounted on the manhole cover for the forward compartment of the cargo tank to remain secured. (Author/publisher)