What was found
AFTER TAKEOFF, WHEN THE LANDING GEAR WAS RETRACTED, THE GEAR DOOR LIGHT STAYED ON WITH A GEAR DOORS EICAS MESSAGE. RECYCLED GEAR, AND THE INDICATIONS REMAINED. PERFORMED TROUBLESHOOTING IAW FIM 32-09 FAULT TREE 804, PSEU BITE PROCEDURE .NO FAULTS FOUND. REMOVED AND REPLACED THE RT MAIN LANDING GEAR DOOR ACTUATOR IAW AMM 32-32-12-4. OPS CHECKED GOOD.