THE ELEVATOR WHILE DESCENDING, STOPPED FOR NO APPARENT REASON APPROX 111 FT FROM THE UNDERGROUND LANDING AREA. FURTHER OPERATIONAL EXAMS SHOWED THE ELEVATOR TO FUNCTION AS INTENDED. DUE TO RELIABILITY CONCERNS, THE MAIN CONTROL CABLE WASREPLACED ON 5/15/03 & OPERATIONAL CHECKS SHOWED THE ELEVATOR TO BE FUNCTIONING AS REQUIRED