As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL - FLT 641 - DURING APPROACH WHEN LANDING GEAR WAS EXTENDED, RIGHT MLG UNSAFE LIGHT REMAINED ILLUMINATED; CYCLED LANDING GEAR. REPLACED RIGHT MLG DOWNLOCK SWITCH, MFG PN H14-6. LANDING GEAR OPERATION AND POSITION AND WARNING SYSTEM CHECKED NORMAL. CHECK C - 1-28-94 - MCI.