As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT T/O RETRACTED GEAR AND BOTH PILOT & S/O REQ GEAR RED LIGHT ILLUM WITH HANDLE UP. PERF RED TABS AND BOTH RED LIGHT REMAINED ILLUM. DUMP FUEL TO 375,000 LBS GROSS WT AND MADE NORMAL LANDING. REPLACED TARGET WITH (P/N ARG7531-501) AND COMPLETED LANDING GEAR RETRACTION/EXT TEST IAW DC10 MM 32-10-00-5.