What was found
(CAN) DURING GEAR DOWN SELECTION , NO 'GREEN' INDICATION FOR NLG , GEAR CYLED, ALTERNATE GEAR EXTENSION SELECTED. SYS RESET AND NORMAL GEAR DOWN SELECTED , ALTERNATE AND NORMAL GEAR INDICATION BOTH SHOWED 'GREEN' INDICATION. NORMAL LANDING. MAINTENANCE REPLACED PSEU , GEAR SWINGS CARRIED OUT WITH NO FAULTS. AIRCRAFT RETURNED TO SERVICE.