What was found
ON FLIGHT 3550 DURING CLIMB CREW REPORTED GEAR RETRACTION RIGHT MAIN GEAR INDICATION REMAINED UNSAFE. DID NOT INDICATE UP FOR SEVERAL SECONDS. CREW RECEIVED LG/LEVER DISAGREE MSG ON EICAS. CREW RETURNED TO GSP AND LANDED WITHOUT INCIDENT. NO OTHER PROBLEMS NOTED AIRCRAFT REMOVED FROM SERVICE. FOUND DEBRIS IN CONNECTOR OF RIGHT MAIN LANDING GEAR UPLOCK BOX. CLEANED CONNECTOR OPERATIONAL CHECK GOOD IAW EMB AMM 32-62-00. AIRCRAFT RETURNED TO SERVICE.