As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON GEAR EXTENSION, NOSE GEAR GREEN DOWN & LOCKED LIGHT FAILED TO COME ON, HOWEVER THE NOSE STEERING ARM LIGHT CAME ON. CONFIRMATION TESTS (THROTTLES TO IDLE & FLAPS PAST 20 DEGREES) WERE DONE & NO GEAR UNLOCKED HORN SOUNDED. GEAR WAS RECYCLED AND WE RECEIVED NO NOSE GEAR LIGHT AGAIN. ABOUT 2 MINUTES LATER THE NOSE GEAR GREEN LIGHT CAME ON.