As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO SYR DUE TO A RED LIGHT ON R1 DOOR STARTED BLINKING AT 2500 FEET MSL AFTER DEPARTURE. AND CONTINUED TO BLINK ON AND OFF FROM ROC TO SYR. THE AIRCRAFT LANDED SAFELY AT SYR WITHOUT FURTHER INCIDENT. (OPEN)