As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COULD NOT SILENCE GEAR WARNING HORN WITH FLAPS 10 AND IDLE POWER FOR 15 SECONDS. CLEANED SENSOR S845. ADJUSTED SENSOR TARGET GAP FOR NOSE GEAR DOWN SENSOR S845. CHECKED RIGHT MAIN GEAR SENSOR S73 AND TARGET. CHECKED LEFT MAIN GEAR SENSOR S71 AND TARGET. M989 CARD TEST PER MM 32-09-20-415 TEST GOOD.