As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT GEAR DOWN AND LOCKED LIGHT DID NOT ILLUMINATE AFTER MULTIPLE TRIES. EVERY ATTEMPT GOT SAME INDICATION. NOSE GEAR AND RT MAIN GEAR GREEN AND LT MAIN GEAR WHITE UNSAFE AND NO GREEN LIGHT. TRIED BOTH FREE FALL AND AUX HYDRAULIC EXTENSION WITH SAME RESULT. IN FLIGHT EMERGENCY DECLARED ENROUTE. LANDING AND TAXI UNEVENTFUL. INSTALLED NEW LT MLG ACTUATOR DOWN LOCK SWITCH. RIGGED AND OPS CHECKS GOOD.