ON 7 FEB. 2003, EE COMPLETED AN ACCIDENT REPORT CLAIMING THAT HIS BACK WAS INJURED WHILE OPERATING A QUARRY TRUCK ON 20 JAN. 2003. HE DID NOT SAY ANYTHING ON 01-20-2003 AND WORKED THROUGH 1-28-03. HE TOOK OFF PART OF 1-28-03 AND 1-29-03TO MOVE HIS FAMILY OUT OF THEIR HOUSE. ON 1-30-030 HE COMPLAINED THAT HIS SEAT WAS BOUNCING. A MECH. CHECKED SEAT DROVE THRU 2-3-03 W/O COMPLAIN