As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON ARRIVAL ON APPROACH CAPTAIN DECLARED EMERGENCY FOR A LEFT MAIN GEAR INDICATION PROBLEM, AIRCRAFT LANDED SAFELY. TROUBLESHOT AND FOUND LEFT MAIN LANDING GEAR GREEN INDICATOR SWITCH BAD. REMOVED AND REPLACED LEFT MLG (GREEN) INDICATOR SWITCH PER AMM 33-11-81, OPERATIONAL CHECKS GOOD.