What was found
PWS CAUTION ON PILOT & CO-PILOT MAPS AT 500' ON APPROACH. AT TOUCHDOWN, PWS DISAPPEARED AND VTK ON CAPTAIN'S SIDE APPEARED WITH LOSS OF MAP INFO FOR APPROXIMATELY 30 SECONDS. ACFT GROUNDED. PERFORMED WEATHER RADAR SYS OPS TEST IAW AMM 34-43-00-710-802-001. ALL TESTS PASSED. FMCS BITE IAW FIM 34-61, TASK 801, SHOWS FMC-L PROGRAM FAULT LOGGED ON GROUND. ACCOMPLISHED TEST FOR FMC-L PROGRAM FAULT IAW FIM 34-61, TASK 807. INITIAL EVALUATION COMPLETED WITH NO FAULTS. PERFORMED FMCS OPS TEST IAW AMM 34-61-00-710-801. ALL TESTS PASSED.