What was found
SJU-PHL WHILE INBOUND TO PHL, THE FLIGHT SHOWED A RT MLG UNSAFE LIGHT ON. CAPTAIN USED ALT EXTENSION PROCEDURE AND DID A FLY BY TO CONFIRM GEAR WAS DOWN BECAUSE ALT PROCEDURE DID NOT SHOW GEAR DOWN. FLIGHT LANDED SAFELY. MAINTENANCE PERFORMED BITE TEST ON PSEU CHECKED IAW AMM 32-09-03-0. REPLAMPED GREEN LIGHT FOR RT MLG IAW AMM 33-13-00. PERFORMED GEAR HYD LEAK AND GEAR AIR TO GROUND CHECK 32-31-00-5. LEAK AND OPS CHECK OK.