What was found
DESCENDING THROUGH 30,000' WE HAD A R THRUST REVERSER UNLOCKED EICAS MSG WITH CORRESPONDING R EMER STOW SWITCH LIGHT ILLUMINATED. EXECUTED PROPER EMER CHECKLIST. THRUST REVERSER DID NOT STOW, PROCEEDED WITH SINGLE ENG LANDING. CONNECTED & ENERGIZED EXTERNAL ACFT POWER & FOUND NO R REV UNLOCKED EICAS MSG DISPLAYED AT THIS TIME. VISUAL INSPECTION OF RT THRUST REVERSER IAW TASK 78-30-00-210-801. VERIFIED THRUST REVERSER IS IN FULLY STOWED POSITION IAW TASK 78-30-00-910-803. CLEANED CONNECTOR ON PDU. REACTIVATED RT THRUST REVERSER IAW TASK 78-30-00-440-801. PERFORMED GND OPERATIONS CHECK IAW TASK 71-00-00-866-815. CND SQUAWK.