As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJU - FLT 770 - 'GEAR DOOR OPEN' ANNUNCIATOR LIGHT ILLUMINATED IN CRUISE FLIGHT WITH NORMAL HYDRAULICS PRESSURE FOLLOWED QRH 4-6. GEAR DOOR OPEN LIGHT ILLUMINATED IN FLIGHT. CYCLE MLG DOORS SEVERAL TIMES AND OPS NORMAL. CHECK DOOR WARNING SENSORS FOR PROPER INSTALLATION AND CLEARANCE AND FOUND NORMAL. FOUND CHAFED WIRE ON RIGHT GEAR DOOR PROX SWITCH. REPAIRED WIRE AND CONDUIT. (M)