As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6345 - IAD-LGA - ABORTED THE APPROACH DUE TO THE LEFT MAIN GREEN PRIMARY INDICATION NOT ILLUMINATING. SECONDARY INDICATION CHECKED GOOD. AIRCRAFT LANDED WITH NO FURTHER INCIDENCE. MAINTENANCE FOUND THE LIGHT LENS ASSEMBLY INTERFERING WITH THE LAMP. (Z)