What was found
DTW - AFTER TAKEOFF, THE NR 2 ENGINE REVERSER AMBER LIGHT ILLUMINATED. NO STATUS, NO EICAS AND NO PRESENT LEG FAULT MESSAGES DISPLAYED. CREW FOLLOWED COCKPIT OPERATING MANUAL, DUMPED 135,000 LBS OF FUEL AND DIVERTED FLIGHT TO MSP. MAINTENANCE VISUALLY INSPECTED NR 2 REVERSER FOR SECURITY AND ADJUSTED TARGET OF LOCK PROXIMITY SENSOR PER MM 78-30-01 PG 501. OPERATIONAL CHECK WAS NORMAL.