September 4, 2013
NTSB Number: RAB-14-04
Adopted: June 27, 2014
On September 4, 2013, about 4:15 p.m., in Mathis, Texas, a Union Pacific Railroad (UP) welder was killed and another UP welder was seriously injured when an S-60 Trax aerial lift vehicle overturned. At the time of the accident, the temperature was 102° F, and the weather was clear. The accident occurred on the UP San Antonio Service Unit of the Corpus Christi Subdivision main line at milepost 106.
The National Transportation Safety Board determines that the probable cause of the accident Was the welders' attempt to free the snagged aerial lift bucket from within the bucket, in lieu of evacuating the bucket and using the ground controls.