As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MLG RED UNLOCK LIGHT ILLUMINATED DURING CLIMBOUT AT 28,000 FT. NO ABNORMALITIES PRIOR TO UNLOCK LIGHT. MLG EXTENDED NORMALLY. FOUND LT UPLOCK SWITCH IS DEFECTIVE. REMOVED LT MLG UPLOCK SWITCH & INSTALLED NEW SWITCH IAW MM 32-60-00. RIGGED LT UPLOCK SWITCH. OPS CHECKS ALL SWITCHES, OPS CHECKED GOOD IAW MM 32-80-00.