What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS WHEN GEAR PLACED DOWN, NO GREEN LIGHT INDICIATION ON LEFT MAIN GEAR RAN CHECKBITS NO HELP F/O DETERMINED SOCKET CONNECTION TO BULB HOLDER FAULTY, NO SPRING BACK FELT TO BULB HOLDER JIGGLED IT ENOUGH AND GREEN LIGHT CAME ON. LANDED NORMALLY. MAINTENANCE REMOVED LEFT LANDING GEAR POSITION INDICATOR CLEANED CONTACTS AND REPOSITIONED LAMPS, REINSTALLED AND TESTED MULTIPLE TIMES WITH NO DEFECTS NOTED IAW AMM 32-60-03.