What was found
GJT - AIRCRAFT TOOK OFF FROM GJT, PILOT RADIOED THAT HIS RIGHT GEAR DOOR AMBER ANNUNCIATOR HAD REMAINED ILLUMINATED AFTER GEAR RETRACTION, PILOT THEN CYCLED GEAR AND RECEIVED A RED RIGHT GEAR UNSAFE INDICATION, HE THEN ALTERNATELY EXTENDED THE RIGHT GEAR AND RETURNED TO GJT. GJT MAINTENANCE JACKED AIRCRAFT, CLEARED PSEU MEMORY TO BEGIN TROUBLESHOOTING, PERFORMED NUMEROUS RETRACTIONS AND EXTENSIONS WITHOUT BEING ABLE TO DUPLICATE DISCREPANCY. AIRCRAFT WAS THEN RETURNED TO SERVICE. (X)