What was found
FLT 1546 AND FLT 527 - ORF - BOTH FLIGHTS RETURNED TO ORF DUE TO LANDING GEAR PROBLEMS. ON BOTH OCCASIONS AFTER TAKEOFF FROM ORF, WHEN THE LANDING GEAR WAS RETRACTED, THE INTRANSIT LIGHT REMAINED LIT AND A 'RT MLG' WARNING ANNUNCIATED ON THE MULTIFUNCTION DISPLAY. BOTH RETURN TO FIELD LANDINGS OCCURRED WITHOUT FURTHER INCIDENT. MAINTENANCE SECURED AND ADJUSTED A LOOSE RIGHT AFT MAIN GEAR DOORLOCK SENSOR. (M)