As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GEAR RETRACTION RECEIVED A RED LT MAIN GEAR LIGHT ON THE PRIMARY AND SECONDARY INDICATORS. PERFORMED QHR PROCEDURES AND HAD SAME INDICATIONS. DUMPED FUEL TO MAX LANDING WT AND RETURNED TO DEPARTURE. R & R LT MLG CRANK SENSOR SUPPORT FOR THE UP AND LATCHED INDICATION. REF CMM 32-34-03. ADJUSTED MLG UP AND LATCHED PROXIMITY SENSOR TO OBTAIN NECESSARY CLEARANCE REF AMM 32-61-15-4. PERFORMED PSEU RTS TEST, TEST PASSED REF AMM 31-71-01-2. PERFORMED MULTIPLE GEAR SWINGS WITH CORRECT INDICATIONS. REF AMM 32-10-0-5.