What was found
DEPARTING SJU, CREW REPORTED A GEAR DISAGREE & GEAR DOOR LIGHT MESSAGE WHEN GEAR IN UP POSITION. ALSO REPORTED GEAR INDICATION LIGHTS EXTINGUISHED. FOLLOWED QRH & RETURNED TO SJU. PUT GEAR DOWN TO RETURN TO SJU, RT MLG DID NOT INDICATE DOWN & LOCKED. DID A GO-AROUND & EXTENDED MLG USING ALT EXTEND, & EMERGENCY DECLARED. ALL GEAR IND GREEN & AN UNEVENTFUL LANDING. ITEM DEFERRED TO MEL 32-30-1. PLACARD INSTALLED. C/W DEACT. PROC. IAW MEL MPM 32-30-1. ACFT REMAINS NO ETOPS. R & R RT DOOR SEQUENCE VALVE IAW AMM 32-32-06. & REPLACED RT UPPER MLG POSITIONER IAW AMM 32-32-19. PERFORMED OPS & LEAK CHK, NO FAULTS. OPS CHKD GOOD. GEAR SWINGS AT 28 SEC UP REF NR 106 FOR GEAR SWING. ACFT RTS.