As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3924 - DURING APPROACH, LEFT MAIN LANDING GEAR UNSAFE ANNUNCIATOR DID NOT ILLUMINATE DURING GEAR EXTENSION. REMOVED AND REPLACED ADVISORY LIGHT CONTROL BOX. RETRACTION AND OPERATIONAL TESTS NORMAL. AIRCRAFT RETURNED TO SERVICE. (M)