What was found
ON APPROACH, ALL FOUR LANDING GEAR UNSAFE LIGHTS REMAINED ON. QRH CLEARED, ALL GREEN DOWN AND LOCK LIGHTS AFTER QRH. TROUBLESHOT IAW FIM 32-30-05-01, NO DEFECTS NOTED. NO CURRENT FAULTS DETECTED, THE PSEU TESTED OK, CLEANED AND LUBRICATED THE LANDING CONTROL MECHANISM IAW AMM 32-31-00-7. OK FOR SERVICE.